Washington State University entomologist Dr. Doug Walsh is worried about a trend he is seeing in pesticide registrations of new compound materials, a trend he believes could disrupt the balance of ecological systems. What Walsh finds alarming is a move by some chemical companies that are going to a “custom blend” of two or more insecticides as a way to improve the product but also make it harder for other companies to compete when ­pesticides go off patent. He explained that because of the length of time it takes for registration approval from the U.S. Environmental Protection Agency, there is […]