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Influence of Crop Safeners on the Interaction of Primisulfuron and Terbufos in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Todd L. Frazier  and
Scott J. Nissen
Todd L. Frazier
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583-0915
Scott J. Nissen
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583-0915
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Abstract

Benoxacor, CGA-185072, and MON-13900 were evaluated in laboratory studies as safeners to reduce injury caused by primisulfuron when corn has been previously treated with terbufos. Without safeners, shoot length was reduced 30% when primisulfuron (78 gm ha-1) followed terbufos (2.6 kg ha-1) applications. Stunting was significantly reduced by preemergence applications of CGA-185072 and MON-13900 at 200 g ai ha-1; however, shoot length was still reduced by 21 and 12%, respectively. Benoxacor did not reduce primisulfuron injury in corn previously treated with terbufos. Safening by CGA-185072 and MON-13900 was not due to reduced primisulfuron uptake or altered translocation. MON-13900 was further evaluated for its effects on primisulfuron metabolism. MON-13900 increased primisulfuron metabolism in terbufos-treated shoots by more than 50%. This increase in metabolism appears to be the mechanism of safening by MON-13900.

Keywords

primisulfuron, 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]-amino]carbonyl]amino]sulfonyl]benzoic acidterbufos, S-[[(1,1-dimethylethyl)thio]methyl]0,0-diethyl phosphorodithioatebenoxacor, 4-(dichloroacetyl)-3,4-dihydro-3-methyl-2H-1,4-benzoxazineCGA-185072, (5-chloro-8-quinolinoxy-acetic acid-1-methyl-hexyl-ester)MON-13900, (3-dichloroacetyl-5-(2-furanyl)-2,2-dimethyloxazolidine)corn, Zea mays L. ‘ Pioneer 3180.’BenoxacorCGA-154281CGA-185072MON-13900herbicide antidotesmetabolismorganophosphate insecticidessulfonylurea herbicides
Type
Weed Biology and Ecology
Information
Weed Science , Volume 42 , Issue 2 , June 1994 , pp. 168 - 171
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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