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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
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583-0915
Scott J. Nissen
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583-0915

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.

Type
Weed Biology and Ecology
Copyright
Copyright © 1994 by the Weed Science Society of America 

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