Soil fumigant emission critically impacts air quality, regulatory restrictions, and pest control efficacy. Advances in application technology and improved knowledge regarding the impacts of edaphic and environmental variables on fumigant soil persistence create opportunities to develop good agricultural practices (GAPs) to reduce fumigant emission. Replicated field trials and flux studies involving multiple soil fumigants were conducted to quantify the interactive effects of low rate and low disturbance application technology, plastic films with resistance to fumigant diffusion, soil moisture, and tillage on soil fumigant retention and atmospheric flux. The results demonstrated that atmospheric flux rates of chloropicrin, 1,3-dichloropropene, and methyl isothiocyanate were reduced to less than 10 �g m-2 s-1 using various combinations of GAPs during fumigant application. In particular, low disturbance technology, virtually impermeable films, soil moisture above field capacity, and the creation of a soil surface seal prior to application all affected fumigant emission.

Contribution of good agricultural practices (GAPs) to soil fumigant emission reduction

244th National Meeting (2012)

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