Board Certified Entomologist (BCE)

Pharaoh ants (Monomorium pharaonis) are highly susceptible to colony fragmentation, or budding, when exposed to repellent insecticides like pyrethroids. Non-repellent baits should be used instead of sprays to allow workers to share the toxicant with the queen. The other options describe chemical degradation or resistance, which do not explain the sudden multiplication of distinct colonies.

Glucose aversion is a documented behavioral resistance in German cockroaches where a genetic mutation causes glucose to taste bitter, leading them to reject baits containing it. Metabolic resistance involves surviving after ingestion, not avoiding the bait entirely. Hydrolysis and pre-molt fasting do not typically cause immediate tactile rejection by an entire active population.

Formosan subterranean termites (Coptotermes formosanus) are uniquely capable of forming true aerial colonies without ground contact if a sufficient above-ground moisture source is available. Drywood and dampwood termites do not build extensive mud tubes. Eastern subterranean termites rarely establish completely disconnected aerial nests without an initial ground connection.

Methoprene is a juvenile hormone analog (JHA) that artificially maintains high levels of juvenile hormone in the insect, preventing it from maturing into a reproducing adult. Chitin synthesis inhibitors (like noviflumuron) and neurotoxins (like neonicotinoids and fipronil) have distinctly different mechanisms of action.

The thermal death point for bed bugs and their eggs is generally accepted to be 122°F (50°C) for at least one minute, but achieving this core temperature deep within insulated areas requires careful monitoring and air movement. Bed bugs do not survive 135°F via heat-shock proteins, nor does heat induce diapause in a way that protects them from lethal temperatures.

Entomologists must correctly identify specimens and refuse to apply pesticides when no target pest is present, while strictly avoiding making medical or psychiatric diagnoses. Applying pesticides for a placebo effect is a violation of IPM principles and potentially the law. Scabies are medical pests treated on the host, not via structural fumigation.

The physical description (humpbacked, running erratically) identifies Phorid flies, which frequently breed in highly decayed organic matter, commonly from broken sewer lines under slabs. Drain flies (Psychodidae) breed in sink drain biofilm, while fruit flies (Drosophilidae) breed in fermenting fruit.

The Red Flour Beetle is distinguished by its abrupt three-segmented antennal club and its ability to fly. The Confused Flour Beetle has a gradually enlarging antennal club and cannot fly. Both are secondary pests that cannot penetrate whole, intact kernels.

Nymphs are responsible for the majority of human Lyme disease cases because they are tiny, easily missed, and feed during peak human outdoor activity. Larvae are not born infected because there is no transovarial transmission of Borrelia burgdorferi. Adult females can transmit the disease, but they are larger and typically noticed and removed sooner.

The most definitive diagnostic feature of Loxosceles spiders is their six eyes arranged in three pairs. While they have a violin marking, this marking is on the cephalothorax (not the abdomen) and can be faded or mimicked by other spiders. They do not build orb webs or have prominent leg spines.

Cat flea (Ctenocephalides felis) pupae can remain dormant in their cocoons for extended periods (the ‘pupal window’) and are stimulated to emerge almost instantly by vibrations, pressure, or carbon dioxide indicating a host’s presence. Larvae do not accelerate pupation due to host absence, and adult fleas do not enter diapause in this manner.

The kdr (knockdown resistance) mutation is a target-site resistance mechanism that alters the voltage-gated sodium channels, preventing pyrethroids and DDT from binding effectively. It does not involve metabolic enzymes like cytochrome P450, nor does it affect the target sites of organophosphates or IGRs.

Lyctine powderpost beetles only attack hardwoods (like oak or hickory) because females require the large pores of hardwood vessels to lay their eggs. Their frass is extremely fine and powdery. Anobiids (Deathwatch beetles) attack both hard and softwoods and produce gritty frass, while Old house borers exclusively attack softwoods.

Aedes aegypti and Aedes albopictus, the primary vectors for Zika, dengue, and chikungunya, are predominantly active and bite during the day. Nighttime ULV applications are highly effective for nocturnal species like Culex, but are generally ineffective against resting Aedes populations.

Insecticidal dusts are ideal for wall void nests because workers pick up the dust and track it deep into the nest, reaching the queen and brood. Liquid treatments often fail to reach the actual nest and can damage the structure. Sealing the hole will cause the wasps to chew their way into the interior of the home, creating a severe safety hazard.

FIFRA Section 2(ee) allows certain deviations from the label, including applying at a lower dosage/frequency, applying against a pest not listed (if the site is approved and not explicitly prohibited), and using any method of application not prohibited. It never allows applying at a higher dosage or concentration than the label permits.

Pheromone traps are highly attractive and can pull insects from significant distances. Placing them near open exterior doors can lure pests from outside the building into the facility. Traps should be placed in a grid pattern inside the facility away from exterior openings. Furthermore, standard IMM pheromone traps catch males, not females.

Hemipterans are characterized by their piercing-sucking mouthparts (rostrum) and incomplete metamorphosis (hemimetabolous). Coleopterans (beetles) possess chewing mouthparts, hardened forewings (elytra), and undergo complete metamorphosis.

Noviflumuron is a Chitin Synthesis Inhibitor (CSI). It must be slow-acting so that foraging termites do not die immediately at the feeding site, allowing them to share the bait with the colony via trophallaxis. Mortality occurs only when the termites attempt to molt, which can take weeks or months.

Oriental cockroaches are highly dependent on water and thrive in damp, cool environments like basements and drains. Moisture control is the most critical cultural control step. They are not typically found in upper-level cabinets (like German cockroaches), and they tend to avoid light.