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Carryover Potential of Imazaquin to Cotton, Grain Sorghum, Wheat, Rice, and Corn

Published online by Cambridge University Press:  12 June 2017

David H. Johnson ,
Ronald E. Talbert  and
Diana R. Horton
David H. Johnson
Affiliation:
Univ. Arkansas, Fayetteville
Ronald E. Talbert
Affiliation:
Univ. Arkansas, Fayetteville
Diana R. Horton
Affiliation:
Univ. Arkansas, Fayetteville
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Abstract

The duration of imazaquin soil activity on corn, grain sorghum, rice, and cotton was studied from 1988 to 1990. Imazaquin applied at 0.035, 0.07, 0.14 (1× rate), and 0.28 kg ai ha−1 was incorporated into the soil, and rotational crops were planted at various times after application. Initial crop visual injury was directly related to imazaquin application rate. Cotton was most susceptible, followed by corn, grain sorghum, and rice. The carryover of imazaquin from soybeans to cotton, grain sorghum, and wheat was studied in separate experiments in Arkansas in 1987 to 1989. Wheat planted in the fall following soybean harvest was not affected by imazaquin residues. Grain sorghum planted the following spring was injured (16–35%), but there was no yield reduction. Cotton recovered from early injury (< 35%) in one year and did not recover from severe injury (> 50%) in the other, resulting in yield reduction.

Keywords

Imazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acidcorn, Zea mays L. ‘B73 x Mol’cotton, Gossypium hirsutum L. ‘Arkot 518’grain sorghum, Sorghum bicolor (L.) Moench. ‘Warner 744-DR’rice, Oryza sativa L. ‘Newbonnet’soybean, Glycine max (L.) Merr. ‘Forrest’wheat, Triticum aestivum L. ‘Florida 302.’Herbicide carryover
Type
Soil, Air, and Water
Information
Weed Science , Volume 43 , Issue 3 , September 1995 , pp. 454 - 460
Copyright
Copyright © 1995 by the Weed Science Society of America 

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