David writes
Alpine D Dust Insecticide will last indefinitely when applied to undisturbed areas such as wall voids, behind cabinets, around windows, doors, plumbing, etc. Is is effective on insects that cross the treated areas as long as the dust is in place however there is no specific time after contact that it takes for the insect to die. Insecticide dusts should be applied with a hand duster such as the B&G Bulb Duster to effectively dust into cracks and crevices.
Please view the product label for rates and specific instructions to your treatment.
Answer last updated on: 09/06/2021