Add-on for nymphs
Best cockroach IGR
Buy a cockroach IGR when monitors still show small nymphs after gel is in the right cracks. The disc does not kill the adults you see tonight. It interferes with development so the next wave is smaller. It is a labeled pesticide. It sits next to Best roach bait, not in place of it.
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Best IGR disc: Cockroach insect growth regulator discs. Gentrol-style point sources. Place them as the label allows, out of food contact, in the rooms that are producing nymphs. Read the food-area rules before a restaurant or a pantry.
Compare the picks
| Role | Tool | Best for | Type |
|---|---|---|---|
| Best IGR disc | Cockroach insect growth regulator discs | A baited German kitchen | Labeled product |
| Required partner | Combat Max cockroach gel bait (syringe) | The adults the IGR will not stop tonight | Labeled product |
Which one to buy
Labeled product
Cockroach insect growth regulator discs
Best IGR disc — Gentrol-style point sources. Place them as the label allows, out of food contact, in the rooms that are producing nymphs. Read the food-area rules before a restaurant or a pantry.
Labeled product
Combat Max cockroach gel bait (syringe)
Required partner — If you only buy the disc, the adults keep depositing oothecae until the bait drops them. Buy both or buy the gel first.
What you should see
A working IGR-plus-bait job shows fewer late-stage nymphs over the following weeks, not an empty floor in an hour. If adults are still thick, the gel is in the wrong place or a repellent spray is on top of it. The disc cannot aim itself.
Common questions
Is an IGR a roach killer?
It is a growth regulator. Adults already walking do not drop the way they do on a bait they eat. Use it with gel.
Can I use an IGR in a kitchen?
Only as the product label allows for food areas. Some placements are cracks and voids, not open counters. Read that panel before you peel the disc.
Do I need an IGR for a few roaches?
Often no. A light German introduction can fall to gel and sanitation. Add the IGR when nymphs keep showing on monitors.