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Control of Wild-Proso Millet (Panicum miliaceum) with Imazethapyr

Published online by Cambridge University Press:  12 June 2017

Clarence J. Swanton  and
Kevin Chandler
Clarence J. Swanton
Affiliation:
Dep. Crop Sci., Univ. Guelph, Guelph, Ontario, Canada N1G 2W1
Kevin Chandler
Affiliation:
Dep. Crop Sci., Univ. Guelph, Guelph, Ontario, Canada N1G 2W1
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Abstract

Several weedy biotypes of wild-proso millet occur throughout Ontario. Field and laboratory studies were conducted in 1986 and 1987 to evaluate imazethapyr for preemergence and postemergence control of wild-proso millet. In the laboratory, imazethapyr, applied postemergence, effectively controlled weedy biotypes of wild-proso millet in the 4- to 5-leaf stage. Seedlings of black-seeded wild-proso millet were controlled at the 1- to 5-leaf stage by 50 g ai/ha of imazethapyr. Higher doses of imazethapyr were required to control later growth stages. In field studies, imazethapyr, applied preemergence or postemergence, effectively controlled black-seeded wild-proso millet, resulting in soybean yields comparable to the recommended postemergence treatment of sethoxydim.

Keywords

Imazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acid: sethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one, wild-proso millet, Panicum miliaceum L. ♯3 PANMIsoybean, Glycine max (L.) Merr. ‘Maple Arrow’Imidazolinonebiotypesgrowth stagesoybean
Type
Symposium
Information
Weed Technology , Volume 4 , Issue 2 , June 1990 , pp. 446 - 450
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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