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2,4-D Safening of Nicosulfuron and Terbufos Interaction in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

David M. Simpson ,
Kevin E. Diehl  and
Edward W. Stoller
David M. Simpson
Affiliation:
Dep. Agron., Univ. Illinois, Urbana, IL. 61801
Kevin E. Diehl
Affiliation:
Dep. Agron., Univ. Illinois, Urbana, IL. 61801
Edward W. Stoller
Affiliation:
USDA-ARS, Urbana, IL. 61801
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Abstract

Normal field applications of both terbufos and nicosulfuron can cause decreased corn tolerance to nicosulfuron because terbufos inhibits nicosulfuron metabolism. In greenhouse studies, applications of 2,4-D at 0.07, 0.14, and 0.28 kg/ha with nicosulfuron reduced terbufos induced foliar injury by more than 50%. Plants treated with nicosulfuron, terbufos, and 2,4-D had significantly higher shoot dry weights than those treated with nicosulfuron and terbufos. When 2,4-D was applied sooner than 24 h before nicosulfuron application or later than 24 h after nicosulfuron application, it did not prevent the interaction. Uptake of 14C-nicosulfuron was increased by the presence of terbufos but was unaffected by 2,4-D. Translocation of 14C-nicosulfuron was low with the highest amounts occurring in the nicosulfuron plus terbufos treatment. Terbufos reduced metabolism of nicosulfuron at 4 and 24 h after treatment compared to plants without terbufos. Metabolism of nicosulfuron in plants treated with terbufos was increased by 2,4-D to a rate equivalent to that in plants not treated with terbufos.

Keywords

2,4-D, (2,4-dichlorophenoxy)acetic acidnicosulfuron, 2[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N-N-dimethyl-3-pyridinecarboxamideterbufos, S-[(tert-butylthio)methyl]-O,O-diethyl phosphoridi- thioatecorn, Zea mays L.
Type
Research
Information
Weed Technology , Volume 8 , Issue 3 , September 1994 , pp. 547 - 552
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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