Zoecon 37860A Gentrol IGR Concentrate 1oz (10) Insect Growth Regulator

Works great! No more German roaches

This is a very effective and cost effective product.

Roaches have deformed wings

I live in an apartment, and never had issues with roaches. new neighbor moved in, and They cook stuff with aromas so intense it permeates the walls and into adjacent apartments. If you can smell what you neighbor is cooking so can roaches. This lead to an infestation. Most stuff you find at the mart is useless since apartment roaches are immune to it. I got some industrial grade roach killers here in Amazon and that worked for a while. It ended the infestation temporarily. After about 3 weeks i had a second infestation but they were baby roaches. So while the industrial grade insecticide works, it is not effective against roach eggs. So you need to mix it with a growth regulator. I did just that mixed Gentrol with the insecticide and the infestation ended in 3 day, and no more baby roaches as well. Excellent product.

Recommended by my exterminator I have been using this twice a year for a couple years

This product description claims it can sterilize cockroaches? I really couldn't believe it, but I still bought it to try. After using it twice, it had absolutely no effect. In fact, as the days went by, the number of cockroaches increased. This was truly a disappointing experience for me!

Finally something that worked. Even the exterminator did not get rid of them. My shower was not used for about 2 months when the glass doors broke and it took that time to get it replaced, and I got an invasion of these things. Tried different gels that said they would work and did not, finally used this one jar every 5 days, I bought a small squirter jar with cap to aim to sides of pipes. After 25 days I have had none for the past 7 days. I will pour 2 lg pots of hot water down drain daily for 30 days. Thanks Gentral for your product and your emails with the advice.

I spray every corner the roaches go, and event in drawers or behind the fridge. I was giving it 1 star because after 3 months, nothing changes. 4 months later, I notice majority of the adult roaches have twist wings which how it affects. However, there’re still lots of the baby ones.