Norwin from West Palm Beach writes
A dry dust like MotherEarth D is best used indoors in wall voids and cracks and crevices. Dust like this will not be effective once it gets wet, so you do not want to spray over the top of dust placements. Since this is a dry, powdery product, we recommend using sprays or granule baits for outdoor pest control rather than dust. Please let us know if you need assistance treating a particular pest or selecting another product.
Answer last updated on: 10/11/2019