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Tridiphane Enhances Wild Oat (Avena fatua) Control by Atrazine-Cyanazine Mixtures

Published online by Cambridge University Press:  12 June 2017

William H. Ahrens  and
Robert J. Ehr
William H. Ahrens
Affiliation:
Dep. Crop Weed Sci., N. D. State Univ., Fargo 58105
Robert J. Ehr
Affiliation:
Dep. Crop Weed Sci., N. D. State Univ., Fargo 58105
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Abstract

Wild oat, a competitive weed in corn, can be controlled by atrazine applied postemergence but at rates causing carryover problems on high pH soils rotated to susceptible crops. Experiments at Fargo, ND and Barnesville, MN were established in corn using atrazine rates ranging from 0.14 to 0.84 kg ai ha–1 supplemented with cyanazine to provide 1.68 kg ai ha–1 total triazine herbicide. Atrazine at 0.84 kg ha–1 plus cyanazine at 0.84 kg ha–1 controlled 2- to 3-leaf wild oat 40 to 55%, but control increased to 90 to 95% by adding tridiphane at 0.56 or 0.84 kg ai ha–1. In greenhouse experiments, tridiphane synergistically increased wild oat control by atrazine and cyanazine. Tridiphane applied 1 or 2 d before atrazine or before an atrazine-cyanazine mixture generally controlled wild oat similar to the tridiphane-triazine tank mix.

Keywords

Atrazine, 6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diaminecyanazine, 2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropanenitriletridiphane, 2-(3,5-dichlorophenyl)-2-(2,2,2-trichloroethyl)oxiranecorn, Zea mays L.wild oat, Avena fatua L. ♯ AVEFAGlutathione S-transferase inhibitorsynergism
Type
Research
Information
Weed Technology , Volume 5 , Issue 4 , December 1991 , pp. 799 - 804
Copyright
Copyright © 1990 by the Weed Science Society of America 

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