All commercial pesticide applicators must take exams in order to become initially certified, and some choose to become recertified by exam rather than by attending continuing instructional courses. With the increased interest in fungicide applications on corn and soybeans, many applicators are considering adding category 1C (Ag Diseases) to their certification so they can apply fungicides.
Iowa State University
Fawcett, James A., "Commercial Pesticide Applicator Test Help Sessions" (2009). Integrated Crop Management News. 706.
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