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Rotation and Continuous use of Dietholate, Fonofos, and SC-0058 on EPTC Persistence in Soil

Published online by Cambridge University Press:  12 June 2017

Brent W. Bean ,
Fred W. Roeth ,
Alex R. Martin  and
Robert G. Wilson
Brent W. Bean
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583
Fred W. Roeth
Affiliation:
South Central Res. and Ext. Ctr., Clay Center, 68933
Alex R. Martin
Affiliation:
Dep. Agron., Lincoln, 68583
Robert G. Wilson
Affiliation:
Panhandle Res. and Ext. Ctr., Scottsbluff
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Abstract

Field and laboratory studies were conducted to examine the influence of continuous use and rotation of extenders on EPTC persistence in soils from Clay Center and Scottsbluff, NE. Rotation of EPTC + dietholate and EPTC + fonofos in soils with three prior annual treatments of each combination did not improve weed control compared to continuous use. SC-0058 was generally effective in slowing EPTC biodegradation in soils previously treated with EPTC, EPTC + dietholate, EPTC + fonofos, or EPTC + SC-0058. Dietholate was effective in slowing EPTC biodegradation in soil previously treated with EPTC or EPTC + SC-0058. SC-0058 appeared to have an inhibitory influence on the initial development of soil-enhanced EPTC biodegradation. Any enhanced biodegradation of dietholate or SC-0058 that may occur after repeated use was not a factor in enhanced EPTC degradation in EPTC + extender history soils.

Keywords

EPTC, S-ethyl dipropylcarbamothioateSC-0058, S-ethyl di-(3-chlorallyl) carbamothioatedietholate, O,O-diethyl O-phenyl phosphorothioatefonofos, O-ethyl S-phenyl ethylphosphonodithioateEnhanced biodegradationenhancementherbicide persistencecarbamothioateweed control
Type
Soil, Air, and Water
Information
Weed Science , Volume 38 , Issue 2 , March 1990 , pp. 179 - 185
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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