IGR Adultoids: What Deformed Roaches Mean

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Why New York Exterminating eliminates German cockroaches in one visit

We are built to eliminate German cockroaches, not manage them on a monthly contract. Our German cockroach service is designed to eliminate the infestation in a single visit, and follow-up visits are for verification only — never re-application. The same technician handles your home on every visit, we don’t lock you into monthly spray contracts or forced annual agreements, and we never blame the tenant’s housekeeping. Every job is ACE-led (Jorge Bedoya, Associate Certified Entomologist, NYSDEC #15140), bilingual in English and Spanish, and we serve all five boroughs plus Nassau and Westchester — with a callback rate under 1%.

Quick answer

Deformed German cockroaches — twisted wings, half-formed adult bodies — are “adultoids”: roaches whose development was disrupted by an insect growth regulator (IGR). They emerge sterile and cannot reproduce, so seeing them is proof the treatment is shutting down the colony’s next generation. NYE uses adultoid presence as field confirmation that a job is working; callback rate under 1%.

What is an IGR adultoid?

Trio Protocol population decline chart: cockroach population falls from 100% to under 1% across the Pyrocide 100 flush, residual and gel bait, and Tekko Trio IGR sterilizer stages
The Trio Protocol population-decline curve: cockroach numbers fall from 100% to under 1% across the Pyrocide 100 flush, the residual and gel bait, and the Tekko Trio IGR (sterilizer) stage that shuts down reproduction.
Jorge Bedoya, ACE, presenting the Trio Protocol population-decline data at ExpoPrag 2026 in Sao Paulo
Jorge Bedoya, ACE, presenting the Trio Protocol at ExpoPrag 2026 in São Paulo.
Adult German cockroach identified during an inspection
Adult German cockroach — light brown, about ½ inch, two dark stripes behind the head.
German cockroaches at all life stages on a monitor
All life stages — egg case, nymphs, and adults — on a monitor.

If you start seeing oddly shaped German cockroaches after a treatment — twisted or stubby wings, half-formed adult features, roaches that look “in between” a nymph and an adult — you’re likely looking at adultoids. These are roaches whose development was disrupted by an insect growth regulator (IGR). Instead of molting cleanly into reproducing adults, they emerge deformed and, critically, sterile.

Why deformed roaches are good news

An adultoid is direct, visible proof that the treatment is reaching the population’s reproduction. IGRs mimic the hormones that control molting; when developing nymphs absorb them, they cannot complete the transition to a fertile adult. A roach that cannot reproduce cannot rebuild the colony — so a wave of deformed roaches signals the population is collapsing rather than coming back.

This is field diagnosis, not guesswork. Reading adultoids tells us the IGR is active and the egg-case generation is being shut down — information a spray-and-leave operator never gathers.

What to do if you see them

Don’t panic, and don’t reach for a repellent spray — that can undo the progress by scattering survivors. Leave the treated zones intact, keep monitors in place, and let the IGR finish working through the hatch. NYE checks adultoid presence on follow-up to confirm the decline; in most homes the visible activity is gone within a couple of weeks and the job is resolved in a single visit.

Our German cockroach trio protocol

Most resolved in a single visit

Because the non-repellents don’t spook the roaches, they keep moving through treated zones and carry it back to the colony — our callback rate is under 1%.

1

Oil-based microinjection deep into voids and harborages.
2

Water-based non-repellent + insect growth regulators (IGRs), microinjected for long residual that also stops the next generation.
3

Targeted gel baiting to finish the colony.

Expert note — Jorge Bedoya, ACE

Frequently asked questions

I’m seeing weird-looking roaches after treatment — is that bad?

It’s usually a good sign. Misshapen roaches (adultoids) are the result of an insect growth regulator disrupting development. They can’t reproduce, which means the colony’s next generation is being shut down.

Should I spray the deformed roaches I see?

No. A repellent spray can scatter survivors and interfere with the IGR’s work. Leave treated zones and monitors in place and let the growth regulator finish.

Family-owned, NYSDEC-licensed, and ACE-led — our German cockroach work carries a callback rate under 1%, with the vast majority of jobs resolved in a single visit.

German cockroach FAQ

How many visits does it take to get rid of German cockroaches?

Most German cockroach jobs are resolved in a single visit. Any follow-up visit is for verification only, never a fresh round of spraying.

Do you require a monthly contract?

No. Our German cockroach service is designed to eliminate the infestation, not to enroll you in an open-ended spray subscription.

What areas do you serve?

We serve all five boroughs plus Nassau and Westchester, in English and Spanish, from our Midwood, Brooklyn base.

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When I spot adultoids on a follow-up, I know the IGR landed where it needed to. A sterile, malformed roach is a roach that won’t rebuild the population. I’d rather see a wave of adultoids than a “clean” kitchen that’s really just survivors hiding — the adultoids tell me the reproduction is broken.

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Service amount$450
Estimated monthly payment $41/mo · 12 monthly payments

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Itz_miya
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So let’s start with professionalism, great! Communication, great! Results, great!!! I was recommended to this company by a friend who experienced great results and i decided to give them a try. Everything there after exceeded my expectations. They have officially become my annual exterminator by choice.
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luzdary falcon
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Estoy muy satisfecha , un trabajo muy profesional , dedico mucho tiempo y es una persona muy pasiente
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Kerri-Kaye Wilson
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Gorge did what he is supposed to do exterminated the rodents. Not only does he possess the skills necessary to get the job done but he has the needed customer service skills of Courtesy, Professional, and Respect. Muchas gracias for a job well done.
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bethany israelov
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Jorge is sweet, patient, communicative and honest. Had a company try to quote me $2500 for a job, luckily I contacted Jorge right in time and he did the same job for me for $220. HIGHLY recommend.
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David Alfih
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Showed up on short notice, found the problem and provided guidance to assist with resolving our issue. Thank you!!
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Michelle
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Jorge was really thorough and did an excellent job. Thank you 🙏
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R L
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Today I had an appointment with Jorge. He was on time. Explained me everything. Perfectly did his work. Very nice and knowledgeable man. I can highly recommend him if you need an exterminator.
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Steve
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George is outstanding! He came out in the middle of the night when we had an urgent issue and handled everything with professionalism and care. He was patient, thorough, and fully committed to solving the problem, taking the time to explain what he was doing and making sure the job was done right. It’s rare to find someone so dependable and dedicated—George is the person you want to call if you need an exterminator you can trust.
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Shashi Shankar
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Jorge was fast, responsive, and knowledgable. I recommend him.

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