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Pest Manag Sci


Title:"Diffusion and emissions of 1,3-dichloro propene in Florida sandy soil in microplots affected by soil moisture, organic matter, and plastic film"
Author(s):Thomas JE; Allen LH; McCormack LA; Vu JC; Dickson DW; Ou LT;
Address:"Soil and Water Science Department, University of Florida, Gainesville, FL 32611-0290, USA"
Journal Title:Pest Manag Sci
Year:2004
Volume:60
Issue:4
Page Number:390 - 398
DOI: 10.1002/ps.825
ISSN/ISBN:1526-498X (Print) 1526-498X (Linking)
Abstract:"The main objective of this study was to determine the influence of soil moisture, organic matter amendment and plastic cover (a virtually impermeable film, VIF) on diffusion and emissions of (Z)- and (E)-1,3-dichloropropene (1,3-D) in microplots of Florida sandy soil (Arredondo fine sand). Upward diffusion of the two isomers in the Arredondo soil without a plastic cover was greatly influenced by soil-water content and (Z)-1,3-D diffused faster than (E)-1,3-D. In less than 5 h after 1,3-D injection to 30 cm depth, (Z)- and (E)-1,3-D in air dry soil had diffused to a 10 cm depth, whereas diffusion for the two isomers was negligible in near-water-saturated soil, even 101 h after injection. The diffusion rate of (Z)- and (E)-1,3-D in near-field-capacity soil was between the rates in the two water regimes. Yard waste compost (YWC) amendment greatly reduced diffusion of (Z)- and (E)-1,3-D, even in air-dry soil. Although upward diffusion of (Z)- and (E)-1,3-D in soil with VIF cover was slightly less than in the corresponding bare soil; the cover promoted retention of vapors of the two isomers in soil pore air in the shallow subsurface. More (Z)-1,3-D vapor was found initially in soil pore air than (E)-1,3-D although the difference declined thereafter. As a result of rapid upward movement in air-dry bare soil, (Z)- and (E)-1,3-D were rapidly volatilized into the atmosphere, but emissions from the near-water-saturated soil were minimal. Virtually impermeable film and YWC amendment retarded emissions. This study indicated that adequate soil water in this sandy soil is needed to prevent rapid emissions, but excess soil water slows diffusion of (Z)- and (E)-1,3-D. Thus, management for optimum water in soil is critical for pesticidal efficacy and the environment"
Keywords:"Allyl Compounds/administration & dosage/chemistry/*metabolism Biodegradation, Environmental/drug effects Diffusion/drug effects Environmental Pollution/*analysis Florida Hydrocarbons, Chlorinated Isomerism Plastics Silicon Dioxide/*analysis Soil/*analysis;"
Notes:"MedlineThomas, John E Allen, L Hartwell Jr McCormack, Leslie A Vu, Joseph C Dickson, Donald W Ou, Li-Tse eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2004/05/04 Pest Manag Sci. 2004 Apr; 60(4):390-8. doi: 10.1002/ps.825"

 
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