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The Influence of Terbufos on Primisulfuron Absorption and Fate in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Todd L. Frazier ,
Scott J. Nissen ,
David A. Mortensen  and
Lance J. Meinke
Todd L. Frazier
Affiliation:
Dep. Agron. Univ. Nebraska, Lincoln, NE 68583-0915
Scott J. Nissen
Affiliation:
Dep. Agron. Univ. Nebraska, Lincoln, NE 68583-0915
David A. Mortensen
Affiliation:
Dep. Agron. Univ. Nebraska, Lincoln, NE 68583-0915
Lance J. Meinke
Affiliation:
Dep. Entomol., Univ. Nebraska, Lincoln, NE 68583-0915
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Abstract

Terbufos and primisulfuron interactions were evaluated under growth chamber conditions using a sand culture system. Terbufos was applied to transplanted corn seedlings, followed in 5 d by foliar applications of primisulfuron plus nonionic surfactant. Primisulfuron and terbufos alone did not cause corn injury; however, shoot dry weight and shoot length were reduced 28 and 36% in terbufos treatments 96 h after primisulfuron application. Primisulfuron absorption and translocation were not affected by terbufos, but the half-life of primisulfuron increased from 2 to 3.5 h in terbufos treatments. Terbufos did not affect primisulfuron metabolite profiles. The basis for increased primisulfuron phytotoxicity in terbufos treatments appeared to result from reduced primisulfuron metabolism.

Keywords

Primisulfuron, 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoic acidterbufos, S-[[(1,1-dimethylethyl)thio]methyl]O,O-diethyl phosphorodithioatecorn, Zea mays L. ‘Nebraska 611’Pesticide interactionsynergismsulfonylurea herbicidesorganophosphate insecticides
Type
Special Topics
Information
Weed Science , Volume 41 , Issue 4 , December 1993 , pp. 664 - 668
Copyright
Copyright © 1994 by the Weed Science Society of America 

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