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This paper describes an instrument, the Laboratory Sprayer, which has been designed to evaluate the compatibility of pesticide tank mixes by a method significantly more representative of field application than the commonly used ball jar test. The Laboratory Sprayer has been designed to incorporate as many features of the full-scale equipment as possible, including constant agitation, circulation through a filter, and spraying through a nozzle to simulate the dynamics of a field application. In contrast to the static ball jar test, this sprayer has been found to show excellent correlation with field conditions.
tank mixes, compatibility, quart jar test, ball jar test, field application, pesticides, agricultural chemicals, flocculation, homogeneous dispersion, compatible agents
Director of product development, Stepan Chemical Co., Northfield, Ill.