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Minimum Effective Rate of Chlorimuron and Imazaquin Applied to Common Cocklebur (Xanthium strumarium)

Published online by Cambridge University Press:  12 June 2017

William L. Barrentine
William L. Barrentine*
Affiliation:
Delta Branch, Miss. Agric. For. Exp. Stn., Stoneville, MS 38776
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Abstract

A field experiment was conducted in 1986 and 1987 to determine the minimum effective rate (MER)3 of imazaquin and chlorimuron applied postemergence to common cocklebur. MER is defined as the quantity required to provide at least 90% control. Based on probit regression analyses, the mean calculated MERs of imazaquin and chlorimuron for 2-leaf common cocklebur were 27.5 and 4.5 g ai/ha, respectively. Under optimum growing conditions, the calculated MERs of imazaquin and chlorimuron for 6-leaf common cocklebur were 34 and 4.6 g/ha, respectively. When applied to 6-leaf plants under slight moisture stress, the calculated MERs for imazaquin and chlorimuron were 54 and 17.4 g/ha, respectively.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino] carbonyl] amino] sulfonyl] benzoic acidimazaquin,2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-4-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acidcommon cocklebur, Xanthium strumarium L. #4 XANSTPostemergenceprobit analysissurfactantsoybeansXANST
Type
Research
Information
Weed Technology , Volume 3 , Issue 1 , March 1989 , pp. 126 - 130
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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