APC Exterminators research journal

APC Review

Long-form, cited research on pest biology, chemistry, resistance, regulation and the economics of the trade, written from the field in Manitoba.

Research articles: 151
Words published: 710,000+
Cited references: 1,503
Subjects: 10

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Chemistry & Modes of Action

Oxidise, Don't Mask: The Chemistry of Skunk Spray, Why Tomato Juice Fails and Why the Smell Comes Back

Skunk spray stinks because of a pair of sulfur compounds that water will not wash away, and it returns on damp evenings because a second set of compounds turns into the first when wet. Tomato juice works only on the nose of the person using it. The remedy that works changes the molecule, and the same oxidation chemistry explains a rare danger to dogs

22 min read20 references Resistance & Evolution

Borrowed Resistance: How House Mice Acquired Rodenticide Resistance from Another Species

Resistance does not have to be evolved from scratch. European house mice took a version of the rodenticide target gene from the Algerian mouse by hybridisation, and it swept once anticoagulants arrived. Malaria mosquitoes did the same with insecticide resistance. Borrowing removes the wait that resistance management quietly relies on

22 min read14 references History, Ethics & Society

Paid by the Rat: Bounties, Rat-Catchers and What a Pest Control Payment Actually Rewards

In 1850s London a rat-catcher could earn more selling live rats to a baiting pit than killing them for a farmer, and one complained that clearing his customers' premises had cost him the customers. In 1902 Hanoi a bounty on rat tails produced tailless rats and rat farms. The best-known version of the story, about cobras in Delhi, has no documented breeding at all

22 min read15 references Technology & Equipment

The Island Premise: Why Gene Drives for Rodents Are Designed for Places Unlike Winnipeg

A gene drive spreads a chosen gene through a population faster than inheritance should allow, and modelling suggests a few hundred modified mice could clear an island of two hundred thousand in about twenty-five years. Every part of that sentence, the island, the decades and the consent it assumes, is what a city does not offer

22 min read25 references Built Environment & Failure Analysis

Heat, Not Disinfectant: Raccoon Latrines, Roundworm Eggs and Why the Attic Is the Hard Case

Raccoon roundworm eggs resist most chemicals, survive freezing and take weeks to become infective, so the usual logic of droppings cleanup runs backwards. Heat kills them, but the flame that works outdoors is barred indoors, which leaves the attic, a common latrine site, as the place where the effective method cannot be used. Half the latrines sampled in Winnipeg were positive

22 min read23 references Data, Statistics & Bioinformatics

Five Stars for the Visit: What Online Reviews Can and Cannot Measure About Pest Control

A review is written when the technician leaves, which is before anybody knows whether the treatment worked. In the credence market that has been studied most, online ratings track the experience of care consistently and its quality inconsistently. New rules against fake reviews address fabrication, not timing

22 min read19 references Economics of Pest Control

Buying the Route: Consolidation in Pest Control and What Integration Does to What Was Bought

The two largest firms grow by buying smaller ones in a fragmented trade with low barriers to entry. One makes dozens of small purchases a year and keeps the local names. The other made one purchase of nearly seven billion dollars and set out to merge the branches, then found that its own synergies were too subjective to report

22 min read15 references Chemistry & Modes of Action

The Trade-Off Arrived: Bromethalin, Pets, and What Happened After Anticoagulants Left the Shelf

Our rodenticide article argued that poisons gentler on the owl are harsher on the dog, because the gentler ones have no antidote. Regulators in both countries then moved consumers onto exactly those poisons. The pet exposure data shifted the way that argument predicted

22 min read14 references Urban Ecology & Pest Biology

Not Made in the Tube: The London Underground Mosquito and a Textbook Example That Was Wrong

The human-biting form of the house mosquito was taught for decades as evolution in action, adapted to London's tunnels within two centuries. A 2025 genomic study traced it instead to aboveground human settlements of the Mediterranean or Middle East more than a thousand years ago. The published paper is more cautious than its press releases

22 min read15 references Regulation & Policy

Harmless in the Tin: Phosphide Fumigants, Three Homes, and Where the Rules Stop

Aluminium phosphide is stable until humid air reaches it, and then it releases a gas that kills anything breathing. In three incidents between 2010 and 2017, eight children died from phosphine at or in their homes. Only one incident involved a licensed applicator, and it was the only one the regulations that followed could have prevented

22 min read17 references Consumer & Comparative Analysis

Fewer Ticks, No Fewer Infections: What the Masked Trials of Yard Tick Control Found

A single spring application of acaricide kills most of the ticks it reaches, and public health advice has long recommended it. When researchers finally ran masked, placebo-controlled trials measuring what residents care about, the ticks went down and the infections did not

22 min read9 references Economics of Pest Control

Who Pays When a Rat Eats the Wiring: The Soy Insulation Lawsuits and a Question Nobody Tested

Our article on pest damage statistics found, in a patent, the unattributed claim that plant-based wire insulation is being eaten by rodents, and called it testable. It went to court instead, repeatedly, for a decade. One judge blamed the rat and an appeals court blamed the wiring. Nobody ran the test

22 min read12 references Resistance & Evolution

Susceptible in the Laboratory, Resistant at the Bait: House Flies and the Test That Forces Them to Eat

Flies from one dairy gained only threefold physiological resistance to imidacloprid in seven years, nowhere near enough to survive a commercial bait carrying three times the dose that kills nearly all of them. The bait failed anyway, because when the flies had a choice they would not eat it

22 min read8 references History, Ethics & Society

The Barrier That Had to Be Paid For: Screwworm, Sterile Flies, and the Cost of Success

The sterile insect technique eliminated the New World screwworm from the United States by 1966 and was then held at the narrowest point of the continent by releasing sterile flies forever. As the problem disappeared, so did the plants. In June 2026 the pest reached Texas again

22 min read12 references Data, Statistics & Bioinformatics

Nobody Reads the Efficacy Data: A Waiver, and the Assumption Underneath It

Federal pesticide regulation requires performance data to be submitted for antimicrobials, public health pests, structural pests and disease-carrying vertebrates. For everything else the requirement is waived. The registrant must still test the product and keep the results, and the agency generally does not ask to see them

23 min read7 references Built Environment & Failure Analysis

The Water Seal: A Cockroach Whose Population Is Not in the Building

Almost everything this journal has written about cockroach control describes one species, an indoor obligate with a closed population. The other common one lives in the municipal sewer. The barrier between it and a floor is a few inches of standing water in a drain trap, and that water evaporates

22 min read9 references Chemistry & Modes of Action

Safe to Eat, Not to Burn: A Fungicide, a Permitted List, and Who Was Doing the Testing

Canadian cannabis producers may use about fourteen approved pest control products and nothing else. The compounds found in the 2016 and 2017 recalls were legal on food, at residue levels within food tolerances. They are prohibited here because one of them releases hydrogen cyanide when heated, and this crop is set on fire

22 min read10 references Regulation & Policy

Spraying an Occupied Room: Aircraft Disinsection and a Border That Does Not Hold

Insecticide is discharged along the aisles of sealed passenger cabins in flight, under a procedure mandated by international health regulations and required by at least twenty-one countries. Which compound gets used is decided by whether anybody is aboard. And the country that banned the practice in 1979 receives treated aircraft every day

22 min read9 references Resistance & Evolution

The Denominator: What a Resistance Ratio Is Divided By

This journal has quoted resistance ratios in a dozen articles. Every one of them is a division, and for bed bugs the number underneath is usually a single colony collected at a New Jersey army base in 1973, kept without insecticide for half a century, and fed for much of that time on the man who collected it

22 min read7 references Economics of Pest Control

Fourteen Dollars of Product: Seasonality, Utilisation and What the Recurring Contract Is For

The business literature of this trade says peak season produces seventy to eighty per cent of annual revenue and that winter falls by half. The one audited figure it cites, from the largest listed company, shows the two peak quarters at 53.5 per cent of the year. Meanwhile a worked example puts materials at fourteen dollars of a hundred and seventy-five dollar visit

22 min read8 references Urban Ecology & Pest Biology

Two Rats in Seventy-Nine Days: What Cats Actually Do to an Urban Rat Colony

Cats have been the universal answer to rats for as long as there have been cities, and until 2018 nobody had counted. When researchers pointed cameras at five feral cats living alongside a colony of well over a hundred tagged rats, every cat stalked and two killed. The rats did change their behaviour, becoming harder to see, which is exactly what success would look like

22 min read8 references Consumer & Comparative Analysis

Do Not Vacuum: Rodent Cleanup Guidance and Where It Disagrees With Itself

One rule appears in every source on cleaning up after mice: never sweep or vacuum dry droppings, because disturbing them puts material into the air you breathe. Below that rule the guidance splits. A provincial health authority says pour the disinfectant and do not use a sprayer. A state authority and a university flyer say spray. And a summary citing the first tells readers to fill a spray bottle

22 min read9 references Technology & Equipment

The Sector That Cannot Spray: Collection Pest Management and What It Knows

Museums cannot apply insecticide to the things they are protecting, cannot discard what gets infested, and cannot accept any damage at all. What they built instead is a set of physical treatment protocols with better-specified dose-response than most of structural pest control, and two technical warnings this trade keeps relearning

22 min read8 references Regulation & Policy

Regulating People, Not Beetles: Ash Borer Quarantine and What Twenty-Two Trees Mean

A beetle that cannot travel far on its own crosses continents inside firewood, so the regulation targets the people moving wood rather than the insect. This city was expected to lose its ash canopy within fifteen years and found twenty-two infected public trees in eight. The city credits its management; scientists were surprised; and the insect was probably present four years before anyone found it

22 min read9 references Data, Statistics & Bioinformatics

One State Counts: Pesticide Use Reporting and the Sector Nobody Measures

There is exactly one comprehensive record of pesticide use in the world, it covers a single American state, and almost everything empirical anyone says about what is applied and where traces back to it. Structural pest control reports into it, product by product and quantity by quantity. Home and garden use is exempt, and the system's own analyst estimates it captures eighty to ninety per cent of actual use

22 min read6 references History, Ethics & Society

The Replacement Nobody Has Explained: Black Rats, Brown Rats and a Benchmark Date

Nearly everything this trade does about rats is built for one species, which took its position in the eighteenth century by displacing another. The cause is given as most likely competition, inferred from timing; new work finds the two occupy different trophic positions; and the arrival date everyone cites for North America traces to a single nineteenth-century author

22 min read9 references Built Environment & Failure Analysis

The Building With No Client: Vacant Property, Demolition and Who Pays for the Rats

A vacant building is a pest source with no occupant to complain, no customer to pay and sometimes no owner to cite. The enforcement machinery assumes somebody at the end of the chain. And demolition, the apparent solution, is a dispersal event, which is why at least one jurisdiction requires a licensed inspection and fifteen days of abatement before the work begins

22 min read8 references Urban Ecology & Pest Biology

Not Attraction: What Two Thousand Years of Light Trapping Got Wrong

Light has been used to catch insects since Roman records, and until 2024 nobody had tested why it works. Three-dimensional flight reconstruction found that insects do not steer toward a lamp at all. They turn their backs to it, which is the reflex that keeps them upright under an open sky, and near a point source that reflex traps them

22 min read7 references Chemistry & Modes of Action

The Group That Carries the Selectivity: Neonicotinoids and What Metabolism Removes

Neonicotinoids were the first insecticides whose selectivity for insects could be attributed to higher affinity at the target itself, carried by a negatively charged nitro or cyano group binding a positively charged residue that vertebrate receptors do not have. Metabolism removes that group, and the resulting compound binds mammalian receptors with an affinity compared to nicotine

22 min read8 references Consumer & Comparative Analysis

The Same Molecule, Two Legal Statuses: Mothballs Used as a Wildlife Repellent

A mothball label names an airtight container as the only approved site of use. People scatter them in attics, crawlspaces and gardens against a dozen vertebrates, which is illegal and cannot work. And the reasoning behind the mistake is better than it looks, because the same active ingredient is sold legally as an outdoor wildlife repellent in a differently formulated product

22 min read9 references Technology & Equipment

Two Days: Bird Deterrents and Three Different Ways to Fail

In one trial, visual and sonic devices reduced a pigeon population during the first two days of a ten day treatment. Ultrasonic units emit above 15 kilohertz at birds whose hearing falls away past ten. And in four European cities, magpies and crows have been tearing anti-bird spikes off buildings and building nests out of them

22 min read14 references Urban Ecology & Pest Biology

Ten Feet and Two Hundred Meals: How the House Mouse Inverts the Rodent Programme

A house mouse ranges a few metres from its nest, needs no drinking water, takes its daily three grams in up to two hundred small meals across twenty or thirty sites, and enters a new bait station almost immediately rather than avoiding it for days. Every one of those is the opposite of the rat the standard programme was designed around

22 min read10 references Economics of Pest Control

Under Three Per Cent: The Only Outcome This Trade Measures

Industry guidance says a callback rate under 3 per cent is good and anything over 6 should alarm you. The same literature says a first-time fix rate of 70 to 80 per cent is excellent. Those are the same quantity counted from opposite ends, and the benchmarks are incompatible by a factor of five

22 min read8 references Resistance & Evolution

Physics Is Not Immune: Testing Whether Bed Bugs Can Evolve Heat Resistance

Heat treatment is sold on the premise that an insect cannot adapt to temperature the way it adapts to a compound. Somebody selected bed bugs for heat survival across generations to find out. Survivorship rose, and then stopped rising after the fourth generation, which is neither the reassurance the trade claims nor the alarm the question implied

22 min read6 references Technology & Equipment

Four Point Seven Millimetres: The Application Category That Is a Hand Position

A crack and crevice treatment is defined by the absence of any deposit on an exposed surface, and in food areas a deposit outside the crack may put the application in breach of federal law. The German cockroach prefers a gap about 4.7 millimetres wide. The legal character of the application is therefore decided by where a technician holds the tip

22 min read9 references History, Ethics & Society

Supplemental Rat Killing: A Public Programme That Worked and Was Discontinued

The American federal urban rat control programme described its own services in a fixed order: resident education, code enforcement, improved municipal services, neighbourhood cleanup, and supplemental rat killing. Poisoning came last and carried the adjective. One state programme removed 177,000 tons of harbourage from 66,000 premises in four years and reported rat bites down 40 per cent

22 min read13 references Built Environment & Failure Analysis

The Corridor Below: Sewer Laterals, Rat Entry, and What a Camera Can Prove

Genetic work in one city found underground infrastructure to be the strongest facilitator of rat gene flow, and sewer baiting data in another identified shallow, narrow, old sanitary pipes as where the animals are. The route is real. What our own industry sells against it is a camera survey, and the claim that most infestations begin this way is one we could not trace to anything

22 min read10 references Data, Statistics & Bioinformatics

What the Regulator Actually Saw: Efficacy Evidence Behind a Registered Label

For most of the last forty years an American pesticide could be registered without anyone at the agency examining whether it worked, on the stated view that agricultural pesticides are effectively regulated by the marketplace. Where efficacy data is required the standards are careful and specific, and one of them says plainly that a knocked down insect is not a dead one

22 min read11 references Chemistry & Modes of Action

Knocked Down Is Not Dead: What a Quick Kill Claim Measures

A 2026 study tracking individual house flies found that rapid knockdown by Type I pyrethroids did not consistently predict whether the insect died, while for Type II compounds and organophosphates it did. The authors say so plainly: knockdown speed should not be used as a proxy for lethality, and claims such as quick kill or kills on contact may misrepresent what these products do

22 min read7 references Regulation & Policy

Fewer Rats, or Fewer Sightings? What Waste Containerization Actually Demonstrates

Baltimore reported a 47 per cent fall in rat complaints after issuing lidded carts citywide, and a New York pilot reported a 55 per cent fall in sightings. Both figures count human reports. Containerization removes the torn bag from the sidewalk, which is the place and moment at which a rat is seen, so the intervention reduces the observability of the thing it is measured by

22 min read10 references Consumer & Comparative Analysis

Four Methods, One That Works: What Wasp Control Actually Delivers

Trapping queens in spring did not reduce the workers caught in late summer. Most nests cannot be found at all. The one method that reliably suppresses a population is selective, well established, and useless by the time anyone asks for it, because it depends on the wasps still wanting the thing it is made of

22 min read7 references Resistance & Evolution

The Barrier: Why Resistance Mechanisms Multiply Instead of Adding Up

Change the route of application from injection to the insect's surface and a bed bug strain's resistance ratio rises by three orders of magnitude. The cuticle is doing that. On its own it confers little, but it buys time for the enzymes, which is why the mechanism that looks weakest in isolation is the one that turns ordinary resistance into the striking multi-class phenotypes

22 min read7 references Chemistry & Modes of Action

Blocking the Brake: Fipronil, the Dieldrin Allele, and the Target That Rescued It

A point mutation in the insect GABA receptor confers high resistance to dieldrin, is widespread and persistent decades after that chemistry went, and makes the mutant channel markedly less sensitive to fipronil, which binds at the same site. And fipronil still controls dieldrin-resistant populations, because it has a second target the mutation does not affect

22 min read7 references Economics of Pest Control

Twenty-Five Per Cent of Unknown: Tracing a Number This Trade Repeats

Rodents are said to cause twenty to twenty-five per cent of fires of unknown cause. The figure appears on a state health department page, on a national trade association's site, in a patent and across pest control company blogs. Every source that attributes it attributes it to another source that does not, and the claim assigns a cause to the one category of fire defined by having no cause assigned

22 min read8 references Data, Statistics & Bioinformatics

Eighty-One Point Two: What a Restaurant Inspection Score Measures

In one state's data, restaurants that went on to cause a foodborne outbreak had a mean score of 81.2 on their last routine inspection, and that did not differ from restaurants with no reported outbreak. Mean scores awarded by individual inspectors ranged from 69 to 92. And yet posting the grades appears to work

22 min read8 references History, Ethics & Society

Fifty Years of Absence: What Suppressed Bed Bugs, and What Stopped

The standard account is that DDT eliminated bed bugs and resistance brought them back. But resistance to DDT in bed bugs was reported within a few years of its deployment, and they stayed rare for five more decades. What held them down was not one chemistry. It was a succession of them, and the succession ended

22 min read8 references Regulation & Policy

Banned, Repealed, Promised Again: The Manitoba Cosmetic Pesticide Regulation

This province restricted lawn-care pesticides in 2014, repealed the lawn prohibition in 2022, and heard a commitment to restore it in 2023. The repeal rested on a specific empirical claim: that the permitted alternatives did not work, so people used more product at higher cost. That claim is testable, and we could not find anybody who tested it

22 min read10 references Consumer & Comparative Analysis

Fewer Than a Hundred Eggs in Eight Years: The Pest That Breaks the Model

Structural pest control is built around fast reproduction: short generations, large broods, and rebound after treatment. A female silverfish lays fewer than a hundred eggs across a life of two to eight years and may take three years to reach maturity. A large population is therefore not an emergency. It is a record of how long the building has had them

22 min read10 references Technology & Equipment

Bait Uptake Is Not a Population: Fertility Control for Rats

The registered rat contraceptive works by depleting the ovarian follicle reserve, which does not regenerate, so its effect is closer to accelerated ovarian failure than to contraception. The mechanism is documented in detail. A 2024 review states that its field efficacy cannot be assessed from the published literature, because the published field work reports how much bait the rats drank

22 min read8 references Urban Ecology & Pest Biology

Four in Five Had Clean Kitchens: What the Sanitation Evidence Actually Shows

Sanitation is the first recommendation in every pest management programme, and the evidence for it is real: apartments with a poor sanitation rating were two point seven times more likely to have German cockroaches. But only one apartment in ten had a poor rating and three in ten had cockroaches, which means most infested homes were not dirty ones

22 min read7 references Built Environment & Failure Analysis

Ninety Square Inches and Not One Mouse: Why Airtightness Is Not Exclusion

Building science has the measured envelope number this journal keeps saying pest control lacks. A blower door test reports a whole house as a single equivalent hole, and a code-minimum house of fifteen hundred square feet comes to about ninety square inches of it. That number cannot tell you whether a mouse can get in, and the reason is mathematical

22 min read8 references History, Ethics & Society

No Rat Falls: The Founding Story of Pest Control and the Evidence For It

The hundredth article in this journal examines the claim the entire trade rests on. Rats and their fleas spread the Black Death. The mechanism was established by observing a different pandemic five centuries later, the rat die-offs that pandemic produced are absent from the medieval record, and a 2018 model gave the rat hypothesis five times the realistic rat population and it still lost in seven cases of nine

22 min read10 references Technology & Equipment

Eight Centimetres Across the Grain: Listening for Insects Inside Wood

Acoustic detection is governed by a trade-off with no solution. Background noise vanishes above twenty kilohertz and so does the range, because the attenuation coefficient rises a thousandfold between five hundred hertz and a hundred and twenty. Wood passes ultrasound for over two metres along the grain and about eight centimetres across it

22 min read7 references Economics of Pest Control

A Guarantee of More of the Same: What a Pest Control Warranty Actually Promises

A warranty is supposed to be evidence of quality, because a seller whose work fails often cannot afford to offer one. The standard pest control guarantee promises a further application of the treatment whose effectiveness the buyer could not verify in the first place, adjudicated by the seller's own inspector, and voided by the conditions under which a claim would arise

22 min read9 references Resistance & Evolution

The Nonstrategy Benchmark: What the Models Say About Rotating Chemistries

Every resistance management guideline says to rotate. The modelling literature reports that rotations and mosaics show minimal gains over simply using one product until it fails and then switching, and it calls that switching the nonstrategy benchmark. Mixtures do better, but only in one half of the parameter space, and structural pest control sits in the other half

22 min read8 references Data, Statistics & Bioinformatics

One Spider in Five Hundred and Eighty-One: Diagnosing an Animal That Is Not There

A 2003 paper's title states the finding outright: diagnoses of brown recluse bites greatly outnumber actual verifications of the spider in four western states. When the public was asked to send in the spiders they believed were recluses, five hundred and eighty-one arrived from California and one of them was, carried there by a family moving from Missouri

22 min read8 references Chemistry & Modes of Action

The Poison the Insect Has to Make: Chlorfenapyr and the Inversion of Metabolic Resistance

Nearly every insecticide this journal has covered is broken down by the insect's own oxidase enzymes, and resistance means making more of them. This one is not a poison until those same enzymes have worked on it. Inhibiting them, which is what a synergist does, makes the product less effective rather than more

22 min read6 references Built Environment & Failure Analysis

Sixty-Five Per Cent Again: Grain Storage, Water Activity, and the Lesion That Spreads Itself

Storage fungi need a relative humidity of at least sixty-five per cent, which is a cereal grain at about thirteen per cent moisture. This journal found the same figure two articles ago for an organism with nothing else in common with a mould. And a hot spot in a bin is the only pest problem we have covered that drives itself outward by making its own centre uninhabitable

22 min read10 references Consumer & Comparative Analysis

Fifteen Square Millimetres: Pantry Pests, Packaging, and the Difference Between Can and Does

The packaging literature divides stored product insects into penetrators, which chew their own way in, and invaders, which use an opening that is already there. It measures what each species can cut through, in square millimetres. One source reports that most real infestations come through seams and closures and rarely through penetrations at all

22 min read8 references Regulation & Policy

Thirty Per Cent Were Stairs and Decks: What Actually Injures Pest Control Technicians

Everything that regulates this trade regulates chemicals. The industry's own insurer reports that slips and falls on stairs, decks and retaining walls made up thirty per cent of work injury claims in one year, and states explicitly that these were not ladders. The protective clothing worn against the regulated hazard appears on the same safety lists as a cause of heat illness

22 min read13 references Urban Ecology & Pest Biology

The Pest in the River: Black Flies, Bti, and the Control That Happens Nowhere Near a Building

A University of Manitoba survey of the Souris River found ten species of black fly, of which five bit livestock and people and the most abundant bit neither. The larvae hold to rocks under winter ice and filter the current for food, which is exactly how the larvicide reaches them. Nothing a structural contractor does touches any part of it

22 min read14 references Economics of Pest Control

Highly Scriptable: What the Pest Control Labour Market Says About the Work

An acquisition advisory firm told buyers that the underlying technical work is highly scriptable. The trade's own labour data says service quality dips during a transition, that new hires take time to get up to speed, and that replacing a technician costs between half and twice their annual salary. Those are not statements about scripted work

22 min read7 references Resistance & Evolution

A Failed Disinfection Is a Selection Event: Biocide Resistance and the Sanitation This Trade Recommends

Ten consecutive days at 0.6 milligrams per litre of a common food-plant disinfectant was enough to reduce a pathogen's susceptibility to a clinical antibiotic. This journal has made the sublethal argument three times for insects and rodents. The bacterial version is better documented and it runs through the drains we tell clients to clean

22 min read7 references Regulation & Policy

Eighty Per Cent Within Three Hundred Seconds: The Trapping Standard That Does Not Cover Us

There is a binding international agreement specifying how quickly a trap must render an animal unconscious, how many animals must be tested, and what counts as an injury. Canada signed it. It applies to mammals traded for their fur, which means it does not reach a single animal this trade routinely kills

22 min read12 references Technology & Equipment

Six Hundred Genera in the Dust: What Environmental DNA Could Tell a Pest Inspector, and What It Cannot

A citizen science project vacuumed dust from seven hundred homes and recovered six hundred arthropod genera across twenty-eight orders. Biosecurity officers have pulled a quarantine beetle's DNA out of floor dust with a handheld vacuum. The method's failure mode is the exact opposite of the one this trade already has, and that is both the opportunity and the trap

22 min read14 references History, Ethics & Society

Never Banned: What Actually Happened to DDT in Malaria Control

This journal wrote three articles ago that the argument about restrictions costing lives deserved more than a paragraph. Here it is. The central factual claim turns out to be wrong in a specific and checkable way, the underlying grievance is real, and the entomology is against everybody

22 min read9 references Consumer & Comparative Analysis

Seventy Thousand Times: The Minimum Risk Exemption and What Essential Oil Pesticides Actually Do

A category of pesticides is exempt from federal registration because its ingredients are safe. Nothing in that exemption concerns whether they work, and the state regulators administering it have written down that a product killing ninety per cent of a pest population would not qualify for the category at all

22 min read14 references Data, Statistics & Bioinformatics

Two Units Per Gram: The One Real Threshold in Structural Pest Control, and Why Nobody Measures It

This journal argued that structural pests have an effective injury level of zero and therefore no action threshold can exist. There is one exception. Allergy medicine has a measurable quantity, a validated assay, two numbers with decision meanings and a demonstrated response to treatment. It is also, on the current expert reading, probably not a threshold at all

22 min read8 references Chemistry & Modes of Action

Used Since 1889, Mechanism Still Open: Boric Acid, Borates, and the Solubility Paradox

Borax was recommended as a cockroach bait in the 1880s. The active was registered in 1948 and by 1993 sat in 189 products. A patent from the late 1980s states that it is toxic to insects at 0.05 to 0.2 per cent in wood and that its mode of action is unknown, and the modern sources still list four or five candidates. What makes it work is not potency but the fact that insects will not avoid it

22 min read9 references Built Environment & Failure Analysis

The Only Pest That Drinks the Air: Dust Mites, the Humidity Threshold, and Why Half-Measures Fail Twice

A house dust mite has no access to liquid water and is three-quarters water by weight. It survives by pulling vapour out of unsaturated air using a secreted salt solution, and below roughly 65 per cent relative humidity it cannot. That makes this the one structural pest whose control is pure building physics, and it explains why an avoidance literature of more than fifty trials reached a null result

22 min read12 references Economics of Pest Control

Near-Bond-Like Cash Flow: What the Recurring Pest Control Contract Is Actually Priced On

Preventive service is the correct answer to a real problem this journal described three articles ago. It is also a service whose success and whose complete absence look identical to the customer, and the capital markets have noticed: monthly plans are reported to command higher valuation multiples than quarterly ones, and businesses that solve the problem permanently are worth less than businesses that manage it forever

22 min read9 references Regulation & Policy

A Sock Is a Sock Until You Say Otherwise: The Treated Article Exemption and Where Pesticide Law Draws Its Line

The same biocide, in the same garment, at the same concentration, is an exempt consumer good if the label says it protects the fabric and an unregistered pesticide if it says it protects you. The line is drawn at the claim, not at the chemical. In most cases there is no requirement to tell the buyer the product was treated at all

22 min read12 references Resistance & Evolution

Seven Generations, or Never: Whether Resistance Decays When You Stop Selecting For It

Every rotation programme assumes a withdrawn chemistry recovers. Sometimes susceptibility returns in seven generations. Sometimes the allele is still at high frequency years after the product left the market. One experiment on one mosquito with four insecticides produced three different decay rates

22 min read14 references History, Ethics & Society

The Cult of the Balance of Nature: What Silent Spring Actually Argued, and Who Had Argued It First

The book is remembered as being about poison. Its case was ecological and economic, and it was that indiscriminate treatment defeats itself. The head of the company making the compound dismissed the author as a fanatic defender of a cult. The thing he was calling a cult is now the opening paragraph of extension bulletins

22 min read10 references Data, Statistics & Bioinformatics

Two Beetles Per Kilogram, or One Cockroach in the Building: Why the Threshold Concept That Transformed Agriculture Inverts Indoors

The great conceptual advance of 1959 was deciding that some pests could be tolerated, and calculating how many. A grain silo may tolerate up to two beetles per kilogram. A large hotel is reported as tolerating zero, or possibly one, German cockroach. When the tolerable number is zero, every decision rule built on thresholds stops working

22 min read8 references Technology & Equipment

Whispers in the Walls: What the Detection Devices Actually Find, and the One Claim the Research Literature Flatly Denies

Trade material says thermal cameras see the heat termites generate in a wall. The research literature says larvae are ectotherms producing too little heat to resolve, and that infrared is generally unsuited to the job. Independent testing of early acoustic detectors found them catching a feeding colony about half the time from fifty centimetres

22 min read9 references Chemistry & Modes of Action

Nobody Knew How It Worked: Repellent Mechanism, and Why the Best Product Against Mosquitoes Is the Worst Against Ticks

For decades the molecular target of the commonest repellent was unknown, which the literature says held back the search for alternatives. The resolution turned out to reconcile two models nobody thought could both be right. And the ranking of the four main actives inverts completely depending on what is trying to bite you

22 min read9 references Consumer & Comparative Analysis

Hundreds of Starving Mites: The Biting Problem That Successful Pest Control Creates, and Why It Gets Misdiagnosed

Remove a rat or a bird nest and the blood-feeding parasites living in it are left with nothing to eat. They are between three tenths of a millimetre and one millimetre long, they leave the skin after feeding, and they can persist for weeks. The complaint that follows is routinely attributed to something else

22 min read8 references Economics of Pest Control

A Letter in the Window: What Posting Hygiene Grades Actually Changed, and the Part of It That Is Now in Dispute

After grades went up in restaurant windows, the share holding an A rose from 58 per cent to 83, and an A rather than a B was worth around five to six per cent in revenue. Whether it made anybody less ill is a question two sets of economists have now argued in print, and the argument is not settled

22 min read7 references Resistance & Evolution

The Ingredient That Is Not an Insecticide: What Piperonyl Butoxide Does, What It Does Not Fix, and the Finding That It Can Make Things Worse

It appears in over 2,500 formulations and is sold as the answer to pyrethroid resistance. In bed bug strains resistant more than 2,500-fold, adding it left them 174-fold and 39-fold resistant. And in susceptible mosquitoes, recent work reports that inhibiting the same enzyme impedes the insecticide rather than helping it

22 min read8 references Technology & Equipment

Nothing Dies: The First Registered Contraceptive Bait for Rats, and Why That Is Both the Point and the Problem

A liquid bait containing two compounds that deplete ovarian follicles and disrupt spermatogenesis, taken willingly alongside unlimited food, producing litter size reductions of 93 to 100 per cent in trials. It is reversible, it must never be allowed to lapse, and when it is working there is nothing to show anybody

22 min read8 references Data, Statistics & Bioinformatics

Insects Do Not Use Calendars: Degree-Day Models, and Why Structural Pest Control Still Schedules by the Date

An insect requires a consistent quantity of accumulated heat to reach each life stage, which is why the same species emerges weeks apart in a warm year and a cold one. Agriculture has timed intervention by heat rather than by date for decades. This trade, in one of the most thermally variable climates in the country, has not

22 min read7 references History, Ethics & Society

Forty Years of Decline After Resistance Appeared: Why the Standard Explanation for the Bed Bug Resurgence Does Not Fit the Dates

Resistance to the compound that cleared them was reported within a few years of its introduction, and infestations went on falling dramatically for four decades afterwards. Something other than resistance was holding the line, and the most persuasive candidate is a treatment nobody was aiming at bed bugs at all

22 min read8 references Regulation & Policy

Two Hours in Three Years: What Applicator Certification Tests, and What the Evidence Says Training Actually Changes

A review of thirty-one intervention studies found that education improved knowledge and attitudes but was less successful in changing behaviour and therefore in reducing exposure. Only eight of the thirty-one used biological measures. The regulator making the rules concedes it cannot measure the benefits and rests on the weight of evidence

23 min read8 references Chemistry & Modes of Action

Between One Part Per Million and Three Thousand: Structural Fumigation, the Concentration-Time Product, and the Problem of Saying It Is Safe to Go Back In

Across twenty-three monitored houses the time for the gas to halve ranged from eleven hours to sixty, and the proportion lost during treatment ranged from a fifth to four fifths. The same dose in a different building is a different treatment, and the regulator has found that some listed clearance devices do not accurately measure the clearance level

22 min read8 references Resistance & Evolution

The Strategy Everyone Recommends: What the Evidence Actually Says About Rotating Insecticides

Rotation has been the cornerstone of resistance management for decades. The modelling that underpins it mostly found rotations gaining little over simply running each product until it failed, the field trial that would settle the question would take longer than anyone funds, and extension guidance and recent models disagree about mixtures

22 min read8 references Technology & Equipment

The Lamp Still Looks Fine: Ultraviolet Decay, Placement Errors, and Reading an Insect Light Trap as Data

Fluorescent output can fall a quarter or more within a year while the tube continues to light normally, so a working lamp is not an effective one. Placement determines whether a unit intercepts insects entering or advertises the building to insects outside, and the test for the second costs nothing

22 min read8 references Economics of Pest Control

Superior, With a Serious Rodent Problem: Who Pays for a Food Safety Audit, and What That Buys

A facility later found to be dilapidated and salmonella-ridden was rated superior months earlier by an auditor the facility was paying. The auditor asked for more than the single allotted day and was told the extra time could be paid for at future audits

22 min read9 references Chemistry & Modes of Action

Selectivity Written in Sequence: The First Sprayable RNA Pesticide, and What a Genuinely New Mode of Action Looks Like

A 490 base pair double-stranded RNA matching one gene in one beetle. It killed the target comparably to a conventional insecticide, and across two years of field trials in three states there was no evidence of effects on beneficial insects, non-pest species or other beetles, where conventional products generally showed them

22 min read8 references Data, Statistics & Bioinformatics

Three Per Cent or Ninety-One: What a Zero Actually Means, and Why Nobody Counts the Surveys They Did Not Do

Routine larval surveys reported three per cent of dwellings infested with a mosquito vector. Oviposition traps found sixty-eight. A model accounting for imperfect detection estimated ninety-one, and the control programme built on the first figure had no measurable effect on infestation

22 min read9 references Regulation & Policy

The Label Is the Instrument: What a Pesticide Label Legally Binds, and Who Has to Tell People When to Come Back

Use directions appear on a legally binding label, and any use in contravention of it is illegal under the Pest Control Products Act. Conviction can carry a fine of up to five hundred thousand dollars and three years. In structural work the operative provision is the re-entry interval, and the commercial applicator carries the duty to communicate it

22 min read8 references Economics of Pest Control

The Peril Nobody Will Insure: Why Pest Damage Is Excluded, and What Carries the Risk Instead

Almost every property policy contains a vermin exclusion. The reasoning is that infestation is gradual and preventable, which is the opposite of what a policy is built for. Discovering the damage suddenly does not change that, and finding it during an unrelated claim can reduce what that claim pays

22 min read9 references Technology & Equipment

Ninety-Two Per Cent of Nine Species: Automated Insect Identification, and the Conditions That Take It Apart

The best reported camera-trap model classified nine insect species at 92.7 per cent precision. Earlier work on thirty-five moth species reached 85 per cent. One study that reported 92.5 per cent was working at the level of insect orders, and another found that changing the colour of the sticky trap significantly changed how well the model performed

22 min read8 references Economics of Pest Control

You Cannot Tell Whether It Worked: Pest Control as a Credence Good, and the Only Remedy the Experiments Support

Economists classify services by what the buyer can assess. In a credence good the quality remains unclear even after consumption. A large experiment on such markets found that liability has a crucial effect on efficiency, verifiability at best a minor one, reputation little influence, and competition lowers prices without improving anything

22 min read8 references Technology & Equipment

Ninety-Eight in the Hotel Room, Forty-Four in the Apartment: Scent Detection Dogs and the Gap Between Validation and Work

Trained canines located planted vials in a laboratory hotel room with 98 per cent accuracy and no false positives. Evaluated in naturally infested apartments, eleven teams averaged a 44 per cent detection rate, every handler believed their dog performed above 95 per cent, and one inspection in sixteen met the proposed detection standard

25 min read9 references Consumer & Comparative Analysis

The Moth in the Air Is Not Eating Your Coat: Keratin Digestion, Larval Damage, and Why Soiling Is the Variable

Adult clothes moths and carpet beetles may not eat at all. The damage is done by larvae, usually undiscovered until afterwards, and the insects prefer wool that has been contaminated with food, body fluids, fungal spores or pollen over wool that has not

22 min read8 references Built Environment & Failure Analysis

Finding Them and Killing Them: Termite Diagnosis and the Gram of Active Ingredient That Ends a Colony

Repellent termiticides form a barrier and leave the population in the soil intact. Non-repellent products are carried back and kill the colony. And a monitoring programme using under a gram of a chitin synthesis inhibitor has eliminated colonies of several hundred thousand insects

23 min read15 references Resistance & Evolution

Where the Residue Goes: The Routes Rodenticide Takes Into Wildlife, and What Every Alternative Costs

Residues reach predators by eating poisoned rodents, and they reach fish-eating birds by rainfall washing bait from sewers into streams. Raptor levels rose sharply after one country approved outdoor use. Every substitute for the persistent compounds carries a cost, and one of them is the loss of an antidote

23 min read9 references Regulation & Policy

Everything Reasonable Is Wrong: Head Lice, School Exclusion, and a Resistance Mutation That Has Not Changed the Prescription

Paediatric, public health and school nursing bodies agree that children should not be excluded, that no-nit rules should be dropped, and that classroom screening has not been shown to reduce incidence. Meanwhile most lice in some samples carry the resistance mutation, and permethrin is still first-line

22 min read8 references Consumer & Comparative Analysis

Rare, Says the Health Department: Pigeon Droppings, the Diseases They Are Sold On, and Who Actually Bears the Risk

A municipal health authority states that the risk of pigeon-related disease is rare and that routine cleaning of a windowsill does not pose a serious health risk to most people. The companies selling dropping removal describe the same material as a risk you cannot ignore

22 min read8 references Urban Ecology & Pest Biology

The Hazard Travels With the Flowers: Pollinator Exposure From Perimeter and Barrier Treatment

Bumble bee colonies foraging on treated flowering clover produced no new queens. The same product on the same turf, after the blooms were mown off and new ones grew, did no measurable harm. One published assessment names barrier sprays by private pest control companies as likely posing significant risk

22 min read9 references Consumer & Comparative Analysis

Nothing Changed Except the Food: Why Yellowjackets Ruin August and Ignored You in June

The usual explanation is that late summer wasps are angrier. The better one is that the larvae which had been feeding the adults a sugary secretion all summer have pupated, and several thousand workers have simultaneously lost their food supply

22 min read10 references Data, Statistics & Bioinformatics

The Trial Where Professional Pest Control Did Not Beat a Leaflet: Mouse Allergen, Asthma, and What Reduction Actually Bought

In a randomised trial of 361 mouse-sensitised asthmatic children, professionally delivered integrated pest management produced no better outcomes than pest management education alone. Underneath that null result is a dose-response finding that matters more than the headline

22 min read10 references Consumer & Comparative Analysis

Thirty-Six Hours: The Number That Governs Tick Risk, and the Four Pathogens It Was Not Written For

Manitoba will offer preventive treatment after a blacklegged tick bite only if the tick is identified, was attached at least thirty-six hours or engorged, and came from a risk area. That threshold is about Lyme disease, and the same tick is now tested for four different pathogens

22 min read10 references Regulation & Policy

Two Programmes, One Truck: Nuisance Fogging, West Nile Vector Control, and What the Buffer Zone Does Not Cover

Winnipeg treats over 28,000 hectares of water for mosquito larvae and says plainly that larviciding is the most effective approach. The fogging truck is the visible part and the last resort, and when the province orders it for West Nile, the ninety metre buffer that protects a registered property stops applying

22 min read9 references Resistance & Evolution

The Residue and the Generation Run the Same Length: Why German Cockroach Populations Come Back

Residual activity is reported to last under about eight weeks. A German cockroach goes from egg to breeding adult in roughly fifty to sixty days. Those two numbers are the whole problem, and the field trial that set out to manage resistance selected for broad cross-resistance instead

22 min read12 references History, Ethics & Society

The Humane Option That Is Not: Translocation Survival, the Vacancy Effect, and Why Wildlife Work Is Carpentry

Of thirty-eight grey squirrels moved from suburban sites to rural woodland, thirty-seven were dead or gone within eighty-eight days. City raccoons moved north of Toronto showed roughly fifty per cent mortality in three months and an estimated seventy-five in a year. Nobody involved intended any of that

22 min read9 references Economics of Pest Control

Priced by the Visit, Judged by the Outcome: What a Bed Bug Quote Actually Buys

In a survey of the industry, 6.1 per cent of companies claimed they could eliminate bed bugs in a single visit and 62.6 per cent claimed two to three. The service is sold in visits and evaluated in eliminations, and almost nobody sells the second

22 min read14 references Regulation & Policy

Commonly Accepted Methods: What Manitoba Law Asks of a Pest Treatment in Rental Housing, and Why That Is Not an Efficacy Standard

The provincial policy makes landlords responsible for getting rid of pests using commonly accepted methods, and gives spraying for insects as its example. The two pests it names as examples are cockroaches and bed bugs, which are the two this journal has spent most effort showing that spraying does not control

22 min read10 references Urban Ecology & Pest Biology

How Many Queens, How Many Nests: Ant Social Structure and Why the Same Species Behaves Differently in a City

Odorous house ants in natural habitat live one nest at a time with a single queen. In urban habitat the same species shows extreme polygyny and polydomy and forms supercolonies. The species name on the service report does not tell you which of those you are treating

22 min read14 references Built Environment & Failure Analysis

Rotten Before It Looks It: Wood Decay Fungi, the Twenty Per Cent Threshold, and the Carpenter Ant as Symptom

Brown rot removes cellulose while leaving the lignin frame standing, so wood keeps its shape long after it has lost its strength. In one trial six per cent mass loss cost thirty-three per cent of compressive strength, and the ant that gets blamed for the damage is usually the second organism to arrive

22 min read15 references Data, Statistics & Bioinformatics

The Number on the Service Report: What a Pheromone Trap Catch Measures, and What It Does Not

Trap catch is treated as a population estimate by almost everyone who reads it. It is a behavioural signal moved by competing food, trap position, dead insects already caught, other species' pheromones, season and outside sources, and under mating disruption the treatment and the instrument use the same compound

22 min read14 references History, Ethics & Society

Hand to Mouth: The Route Applicator Exposure Actually Takes, and Why the Glove Is Not the Answer

Trade guidance puts dermal absorption at about 97 per cent of real-world applicator exposure. When a toxicokinetic model was fitted to the urine of working applicators, the dermal route could not reproduce the data at any plausible dose, and inadvertent oral exposure fitted best

22 min read16 references Consumer & Comparative Analysis

Six Point Seven, Then Eight Point Eight: What Actually Finds Bed Bugs, and How Badly the Obvious Methods Perform

In thirteen apartments that were all infested, visual inspection found an average of 6.7 bed bugs each. Those were removed by hand, interceptors were installed, and seven days later the traps had caught an average of 8.8 more. Only four residents in ten had noticed they were being bitten

22 min read8 references Consumer & Comparative Analysis

Almost Nothing Bites You: Spider Misdiagnosis, MRSA, and the Thinnest Evidence Base in Pest Control

In one series of lesions presented as spider bites, Staphylococcus aureus was identified in 76 per cent. Physicians correctly identify a brown recluse under two per cent of the time. And the spider does not walk across your treated baseboard, because it is sitting in its web

22 min read14 references Built Environment & Failure Analysis

The Refuge Chemistry Cannot Enter: The Flea Pupal Window and Why Almost No Treatment Failure Is Resistance

A cocooned flea waits for pressure, carbon dioxide and vibration, which is to say it waits for you. Adults keep emerging for two to four weeks after a perfect treatment, and the client concludes on day three that it did not work

22 min read16 references Urban Ecology & Pest Biology

The Pest That Is Not Feeding, Breeding or Biting: Overwintering Invaders and a Window That Closes Before Anyone Calls

Cluster fly larvae are parasites of earthworms, so they cannot possibly be breeding in your wall. Asian lady beetles overwinter on cliff faces in their native range and settle for your house instead. Almost every instinct about how to deal with either one is wrong

23 min read16 references Built Environment & Failure Analysis

Anything Softer Than Its Teeth, Given an Edge: The Materials Science of Rodent Exclusion

A rodent incisor is a self-sharpening iron-reinforced chisel that never wears out and never stops growing. It is also curved inward, which makes a flat hard surface nearly impossible to start on. Almost everything about exclusion follows from those two facts

22 min read12 references Technology & Equipment

The Only Control Agent That Reproduces: Entomopathogenic Fungi, Autodissemination and the Aldehyde Problem

A fungus that drills through the cuticle, fills the body cavity, kills in three to five days and then grows out of the corpse to infect the next insect. It is the most biologically interesting approach in structural pest control, and the bed bug's own aggregation pheromone is antifungal

23 min read16 references Chemistry & Modes of Action

The Hormone That Must Be Absent: Insect Growth Regulators, Fifty Years of Promise and Why They Keep Disappointing

Juvenile hormone must disappear for an insect to become an adult. Supply it at the wrong moment and you get twisted wings, giant supernumerary nymphs and sterile adults. It is the most elegant chemistry in pest control, and four decades of commercial use have not met expectations

22 min read15 references Chemistry & Modes of Action

Natural Does Not Mean Inert: Desiccant Dusts, the Silica Gel Advantage and What the Double-Blind Trials Found

Diatomaceous earth reached complete mortality in fourteen days where silica gel took three or four. In a double-blind evaluation, diatomaceous earth products achieved eleven per cent control or less. The dust most people buy is the one that works least well and carries the greater hazard

22 min read13 references Chemistry & Modes of Action

The Same Product, Twice the Result: Substrate, Formulation and Why a Residual Application Fails on Concrete

In one trial, rove beetles exposed to deltamethrin recovered at twenty five per cent on tile and eighty per cent on plywood. Same active ingredient, same rate. The variable that decided it was the surface, and almost nothing in the trade accounts for it

24 min read16 references Urban Ecology & Pest Biology

Five Volatiles and a Histamine: The Chemical Ecology of Bed Bug Aggregation and Why Apartments Share Infestations

The aggregation pheromone was only fully identified in 2015. What it explains is why bed bugs cluster where they do, why they never live on the person they feed from, and why a mark and recapture study found them in the apartments next door to five of six release units

23 min read13 references Urban Ecology & Pest Biology

The Animal Is Not a Passive Target: Neophobia, Conditioned Taste Aversion and Social Learning in Commensal Rodents

Seventy years of behavioural research explains most rodent control failure better than any chemistry does. A rat that refuses a bait station is not being stubborn, it is executing a well characterised risk assessment, and the colony around it is learning from what happens next

26 min read15 references History, Ethics & Society

Rare and Badly Managed: What the Sting Anaphylaxis Literature Says About a Risk the Trade Routinely Misjudges

Fatal sting reactions run between 0.03 and 0.48 per million people per year, which is very rare. Among those who have already had a systemic reaction, only about a third leave hospital with an epinephrine prescription and a referral

12 min read6 references History, Ethics & Society

The One Job Where Doing It Wrong Makes It More Dangerous: Bat Exclusion and the Maternity Window

Sealing a roost in June does not remove a bat problem. It traps flightless pups, drives frantic mothers into the living space, and measurably increases the human contact that rabies risk depends on

13 min read7 references Built Environment & Failure Analysis

A Moisture Problem Wearing an Insect Costume: Carpenter Ants, Satellite Colonies and the Fifteen Per Cent Threshold

The queen never leaves the parent colony, the parent colony is usually outside, and the nest in your wall contains no eggs at all. Almost everything that makes carpenter ant treatment fail follows from those three facts

13 min read9 references Urban Ecology & Pest Biology

One Risk Area to a Province: The Twelve Years That Made Manitoba the Western Frontier of Lyme Disease

In 2006 provincial surveillance found a single blacklegged tick risk area, in the far southeast corner. By 2018 the species was established across much of southern Manitoba. Saskatchewan and Alberta still have none

13 min read7 references Data, Statistics & Bioinformatics

Twenty Five and a Hundred: What Manitoba's Mosquito Programme Shows About Deciding to Treat

Winnipeg will not fog until two consecutive days of measured trap counts clear two specific numbers. Almost nothing else in pest control makes intervention conditional on data this explicitly, and the rest of the discipline should notice

13 min read9 references Urban Ecology & Pest Biology

The Northernmost Colony: Subterranean Termites in Winnipeg and the Surveillance Nobody Runs

A thriving termite infestation was found in this city in 1987 and described in the literature as evidence that the species could expand further north. Almost four decades later there is still no local survey

12 min read7 references Economics of Pest Control

Cheaper Than What: Three Studies on Whether Integrated Pest Management Actually Costs More

One trial found integrated management three and a half times more expensive. Another found the monthly spraying it replaced had no measurable effect on the population over a full year. Both results are correct and they belong in the same sentence

12 min read7 references Data, Statistics & Bioinformatics

Asking the Population Directly: Molecular Resistance Diagnostics and Three Questions Manitoba Has Not Asked

Four separate articles in this journal have ended at the same sentence. The methods for answering those questions are mature, the samples pass through our hands weekly, and pooling makes the cost almost trivial

13 min read6 references Chemistry & Modes of Action

The Trojan Horse: Horizontal Transfer, Tertiary Mortality, and Why Slow Is the Point

A bait that kills quickly is a worse bait. The active ingredient has to travel back into the harbourage inside a living insect, and everything about how modern cockroach control works follows from that constraint

12 min read6 references Regulation & Policy

Two Different Questions: Manitoba's Cosmetic Pesticide Reversal and What Federal Registration Actually Settles

The province repealed its lawn pesticide ban on the grounds that Health Canada is the expert on pesticide safety. That is true, and it does not answer the question the ban was addressing

12 min read8 references Technology & Equipment

Sensors Can Hold Us Accountable: Remote Rodent Monitoring and the Gap Between Its Claims and Its Evidence

The strongest argument for connected monitoring is not that it catches more rodents. It is that it produces a record an operator cannot quietly fail against, and that argument has barely been tested

13 min read6 references Urban Ecology & Pest Biology

Bla g 1 and the Bedroom: Cockroach Allergen, Childhood Asthma, and Pest Control as a Respiratory Intervention

The evidence linking cockroach exposure to paediatric asthma hospitalisation is stronger than anything else in urban pest management. The evidence that removing the cockroaches fixes it is not

13 min read6 references History, Ethics & Society

The Cost Nobody Invoices: Psychological Burden, Clinical Evidence, and What It Asks of a Technician

Sleep loss, hypervigilance and distress are the most consistently reported consequences of infestation and the least consistently counted. The evidence is better than the industry assumes and weaker than the headlines suggest

12 min read6 references Resistance & Evolution

The Last Fumigant: Phosphine Resistance, the DLD Gene, and a Global Survey in Which Three Populations in Four Had Already Failed

Grain storage depends on a single gas because every alternative was withdrawn or restricted. A synthesis of half a century of resistance testing found that most surveyed populations are already resistant to it

14 min read8 references Built Environment & Failure Analysis

Browse by subject

The Review is organised into 10 standing subjects. Choose one to see every article in it.

Regulation & PolicyPMRA registration, Health Canada review, provincial statute, municipal bylaw, and the machinery that decides what may legally be applied in Manitoba.15 articles Chemistry & Modes of ActionActive ingredients, formulation science, metabolic pathways, and the mechanisms by which a compound kills, or stops killing.16 articles Resistance & EvolutionSelection pressure, resistance genetics, cross-resistance, and the evolutionary arms race running inside every treated building.15 articles Urban Ecology & Pest BiologySpecies biology, intraspecific and interspecific dynamics, and how pest populations actually behave in a northern prairie city.15 articles Built Environment & Failure AnalysisWhy programs fail in specific building typologies, attached housing, food premises, institutional and industrial structures.15 articles Economics of Pest ControlUnit economics, market structure, labour, externalities, and the macro and microeconomics of the Canadian pest management industry.15 articles Technology & EquipmentRodenticide chemistry, monitoring hardware, application equipment, remote sensing, and comparative field evaluation.15 articles History, Ethics & SocietyThe history of pest control in Manitoba, the ethics of population control, public attitudes, and the politics of pesticide use in Canada.15 articles Data, Statistics & BioinformaticsSurveillance data, population modelling, genomics, and the quantitative methods underpinning modern pest management.15 articles Consumer & Comparative AnalysisIndependent evaluation of retail products, DIY methods and service models available to Manitoba consumers.15 articles