Strategies for reducing fumigant loss to the atmosphere

Jury, W. A.; Jin, Y.; Gan, J. Y.; Gimmi, Thomas (1997). Strategies for reducing fumigant loss to the atmosphere. In: Seiber, James N.; Woodrow, James E.; Yates, Marylynn V.; Knuteson, James A.; Wolfe, N. Lee; Yates, S.R. (eds.) Fumigants: Environmental Fate, Exposure, and Analysis. ACS symposium series: Vol. 652 (pp. 104-115). American Chemical Society 10.1021/bk-1997-0652.ch010

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A model is developed to describe transport and loss of methyl bromide (MeBr) in soil following application as a soil fumigant. The model is used to investigate the effect of soil and management factors on MeBr volatilization. Factors studied include depth of injection, soil water content, presence or absence of tarp, depth to downward barrier, and irrigation after injection. Of these factors, the most important was irrigation after injection followed by covering with the tarp, which increased the diffusive resistance of the soil and prevented early loss of MeBr. The model offers an explanation for the apparently contradictory observations of earlier field studies of MeBr volatilization from soils under different conditions. The model was also used to calculate the concentration-time index for various management alternatives, showing that the irrigation application did not make the surface soil more difficult to fumigate, except at very early times. Therefore, irrigation shows promise for reducing fumigant loss while at the same time permitting control of target organisms during fumigation.

Item Type:

Book Section (Book Chapter)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences

UniBE Contributor:

Gimmi, Thomas

Subjects:

500 Science > 550 Earth sciences & geology

ISBN:

9780841234758

Series:

ACS symposium series

Publisher:

American Chemical Society

Language:

English

Submitter:

Thomas Gimmi

Date Deposited:

18 Sep 2014 11:42

Last Modified:

18 Sep 2014 11:42

Publisher DOI:

10.1021/bk-1997-0652.ch010

URI:

https://boris.unibe.ch/id/eprint/47674

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