Standardization of Field Methods for Determination of Insecticide Spray Droplet Size.

摘要

Monodisperse (single size) spray droplets of organic liquids were formed in a Berglund-Liu aerosol generator. Up to 50% isopropyl alcohol was required as a volatile diluent to sustain aerosol generation. Droplet impaction and spread factors on teflon and magnesium oxide slides were determined, along with study of velocity of impact up to 20 MPH. A new droplet impingement harp using 10 micron glass fibers was developed for field and research use, as a spray droplet impingement device. The impingement of aerosol droplets (air-borne size range) is a function of droplet velocity and the geometry of the impingement surface. (Author)