Andrea from Layton, Utah writes
I have used Temprid FX multiple times over the last year, and it kills Elm Seed Bugs on contact, but the residual effects have not been impacting the Elm Seed Bugs. Will Onslaught be able to keep killing the Elm Seed bugs even after the initial spray? If not, is there an insecticide that can be recommended to kill/control these bugs beyond the initial application?
Onslaught Insecticide is labeled to control elm seed beetles. We are not sure it would have a longer residual result than Temprid FX, though. What is likely happening is that the population of the elm seed bugs is such that you are constantly seeing new insects, so they are reappearing faster than they are dying, even though they may still be dying from your insecticide application. This article from your Utah Extension service has excellent tips for managing this pest in and around your home.
Answer last updated on: 07/14/2023
