All commercial pesticide applicators must take exams in order to become initially certified and some choose to become re-certified by exam rather than by attending continuing instructional courses. With the increased interest in applying fungicides on corn and soybeans many commercial applicators are considering adding agricultural diseases (category 1C) to their certification.
Iowa State University
Fawcett, James A., "Commercial Pesticide Applicator Test Help Session" (2012). Integrated Crop Management News. 254.
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