Deposition of Insecticide Drops on Coniferous Foliage
ABSTRACT INSECTICIDE drops were counted and sized on coniferous foliage following application of Bacillus thuringiensis, carbaryl, and trichlorphon insecticides to forested areas in Montana, for control of western spruce budworm, Choristoneura occidentalis Free. Majority (86 to 94 percent) of drops observed on con-iferous foliage was < 61 pan in diameter. These an-alytical data are important in any fundamental eval-uation of the actual mechanism of transport and de-position of pesticide spray droplets in a forest environment.