Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/15/2012
Publication Date: 8/19/2012
Citation: Ajwa, H., Sullivan, D., Gao, S., Stanghellini, M., Sullivan, R. 2012. Airborne flux of 1,3-dichloropropene and chloropicrin applied under totally impermeable film as a function of tarp cutting time. American Chemical Society Abstracts. Available: http://abstracts.acs.org/chem/244nm/program/view.php. Interpretive Summary:
Technical Abstract: The most promising emission reduction technique for soil fumigants is the use of totally impermeable film (TIF). This study was conducted to accurately determine the waiting time before cutting and removing TIF from fumigated soils. Four fields were established in CA to identify optimal times to cut TIF in order to control flux peaks of chloropicrin (CP) and 1,3-dichloropropene (1,3-D). The primary difference between fields was the duration of the tarp covering period (5, 10, or 16 days). A mixture of CP and 1,3-D (Pic-Clor 60) was shank applied at a rate of 659 kg/ha. Fumigant emission rates were determined by measuring air concentrations around the four fields. The results of this study demonstrated that peak and total emissions of CP and 1,3-D under TIF are significantly reduced when tarp cutting is extended from five to 10 days. Differences in total emissions between 10 and 16 days were very small.