Helicopter Spray Trial with Sevin XLR (Carbaryl). Tulare County 1982

摘要

The report describes the second helicopter spray trial with carbaryl conducted by the Environmental Hazards Assessment Program, of the California Department of Food and Agriculture, and was designed to provide a more comprehensive data base than the first. The specific objective of the study was to determine the efficacy of a potential gypsy moth aerial pesticide application over an urban location. Sevin was applied from two altitudes, 180 and 50 feet above the tree tops. Samples were taken to determine mass deposition, particle sizes, and air concentrations of carbaryl; in the foliage canopy, on open ground, and downwind of the spray area. The trial established that significant mass deposition of carbaryl can be obtained at higher elevations, but only by sacrificing effective coverage and droplet size.