Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 10/20/1998
Publication Date: N/A
Technical Abstract: Pesticide sorption is a major process controlling the fate of pesticides in soil, but volatilization can be an important pathway for transport of some agricultural pesticides. Because the extent of sorption influences pesticide volatilization, and vice versa, predictions of efficacy and fate of volatile pesticides require knowledge of the distribution of the pesticide in the three phases: soil, water, and air. In this paper, we determined the sorption coefficients for the volatile fungicide triadimefon on eight U.S. soils varying in their physicochemical characteristics as well as the air/water partition coefficients (Henry's constants, Hc). The presence of soluble material from the soils on Hc was also investigated. The batch stripping technique was used to accurately determine Hc values. Results may contribute to better predictions of triadimefon transport after soil application.