Don from Taylorville, Il writes
How long will this stay effective outdoors with rain?
D-Fense NXT is a ready-to-use product that contains residual insecticide and two Insect Growth Regulators, so it will continue working after it dries. While this product is labeled for use on exterior surfaces such as along the foundation, on window sills, and other areas where insects may harbor, we would not recommend a ready-to-use product like this for the longest residual. You would get much longer residual outdoors with a liquid concentrate deltamethrin product such as Suspend Polyzone. D-Fense NXT can be used to control German Cockroaches, but we would recommend using a roach bait gel along with spray for more complete and faster control. We recommend you take a few moments to review our Roach Treatment Guide here for more tips on how to eradicate this pest.
Answer last updated on: 06/09/2020