JCAllen asked 5 years ago
In your review of Raid Flea Killer Plus Carpet & Room Spray, Tips for Success, Vacuuming Procedure, it states “Studies have shown that dry vacuuming shouldn\’t reduce the efficacy of insecticides, It may actually help by causing cocooned adults to emerge into the insecticide.” Whoa! My understanding, based in part on experience, is that Raid (and similar products) kill adult fleas on contact with wet freshly sprayed insecticide, but after the insecticide dries on carpet, it will no longer kill adult fleas; rather it will only inhibit development of newly laid eggs. Am I right or wrong? Thanks.
Adam Retzer Staff answered 5 years ago
JCAllen,
You are right. The adulticide may kill the adult fleas for a little while after drying though (a few days to a week). But you are correct, the long-lasting effect is caused by the insect growth regulator (IGR) ingredient. It remains active indoors for 7 months and prevents eggs and larvae from becoming adults.
Adam
