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Effect of Bentazon, Imazaquin, and Chlorimuron on the Absorption and Translocation of the Methyl Ester of Haloxyfop

Published online by Cambridge University Press:  12 June 2017

Kent A. Croon ,
Mary L. Ketchersid  and
Morris G. Merkle
Kent A. Croon
Affiliation:
Texas Agric. Exp. Stn., Texas A&M Univ., College Station, TX 77843–2474
Mary L. Ketchersid
Affiliation:
Texas Agric. Exp. Stn., Texas A&M Univ., College Station, TX 77843–2474
Morris G. Merkle
Affiliation:
Texas Agric. Exp. Stn., Texas A&M Univ., College Station, TX 77843–2474
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Abstract

Absorption and translocation of the methyl ester of haloxyfop (haloxyfop-methyl) in sorghum were reduced by presence of bentazon in the treatment emulsion. After 6 h, 18% of applied haloxyfop-methyl was recovered from the leaf surface in the absence of bentazon, compared to 43% of that applied in combination with bentazon. An average of 18% of applied haloxyfop-methyl was recovered as haloxyfop + haloxyfop-methyl from leaf tissues outside the treated zone in the absence of bentazon, compared to 8% of that applied in combination with bentazon. Haloxyfop-methyl absorption was similar whether applied with or without formulations of imazaquin or chlorimuron. However, the addition of imazaquin or chlorimuron to treatment emulsions decreased the translocation of haloxyfop + haloxyfop-methyl as only 13 and 12%, respectively, of the total amount of haloxyfop-methyl applied was translocated out of the treated zone. Mixtures of all herbicides were chemically stable; formulations of bentazon, imazaquin, or chlorimuron did not alter the ester or free acid levels of haloxyfop in an aqueous mixture over an 8-h period.

Keywords

Haloxyfop, 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]-propanoic acidbentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxideimazaquin, 2-[4,5-dihydro-4-methyl-4 - (1-methylethyl)-5 - oxo −1H-imidazol-2-yl]-3-quinolinecarboxylic acidchlorimuron, 2-[[[[(4-chloro-6-methoxy − 2 - pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acidsorghum, Sorghum bicolor (L.) Moench. ‘Conlee's Tophand’Antagonisminteractiontank mixherbicidesorghumSorghum bicolor
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 37 , Issue 5 , September 1989 , pp. 645 - 650
Copyright
Copyright © 1989 by the Weed Science Society of America 

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