This isn’t an IGR. It’s an insecticide often used in conjunction with them. It has a fast knockdown on adult fleas and a good residual impact, lasting up to three months in some cases.

What is Nylar?

NYLAR® is an insect growth regulator similar to the naturally occurring insect growth hormones which interferes [stops] their growth or. development. NYlAR® stops [prevents] the nea and certain listed cockroaches from developing into egg laying adults.

How long does it take IGR to work?

Because these IGRs work by interfering with an insect’s molting process, they kill insects more slowly than traditional insecticides. Death typically occurs within 3 to 10 days, depending on the IGR product, the insect’s life stage at the time the product is applied, and how quickly the insect develops.