All commercial pesticide applicators must take exams in order to become certified initially, and some choose to become recertified by exam rather than by attending continuing instructional courses. With the arrival of Asian soybean rust in this country, many commercial applicators are considering adding agricultural diseases (category 1C) to their certification so that they can apply fungicides.
Iowa State University
Fawcett, James A., "Commercial pesticide applicator training" (2006). Integrated Crop Management News. 1190.
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