Andrew A. Thostenson

North Dakota State University

Thostenson is responsible for administering the training and certification of private and commercial pesticide applicators across North Dakota. He is both B.S. and M.S. degrees in Plant Sciences from the University of Idaho.

He has four years of experience as a county extension agent in Washington State and North Dakota. He owned and operated a seed and crop management consulting company in the Pacific Northwestern United States for ten years. He has been in his current position with NDSU for 23 years. He is a former President and current Fellow with the American Association of Pesticide Safety Educators (AAPSE).

Finally, he has written and spoken extensively about Air Temperature Inversions since 2010 and is a co-author of the publication: “Air Temperature Inversions Causes, Characteristics and Potential Effects on Pesticide Spray Drift” (AE1705 (Revised)) from North Dakota State University, Fargo, North Dakota, USA. The publication is also available on-line at