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Wild-Proso Millet (Panicum miliaceum) Control in Soybeans (Glycine max) With Postemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

R. Gordon Harvey  and
Donald J. Porter
R. Gordon Harvey
Affiliation:
Dep. Agron., Univ. Wis., Madison, WI 53706
Donald J. Porter
Affiliation:
ICI Americas Inc., Wilmington, DE 19897
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Abstract

Selective postemergence herbicides were applied broadcast to control wild-proso millet in soybeans early postemergence (early post), postemergence (post), and late postemergence (late post) when wild-proso millet was 2 to 8 cm tall, 3 to 15 cm tall, and 3 to 31 cm tall, respectively. CGA-82725, fluazifop, haloxyfop, and sethoxydim applied early post controlled 75% or less late-season wild-proso millet. Interrow cultivation following early post fluazifop applications improved wild-proso millet control and soybean yields. Higher rates of CGA-82725, haloxyfop, and sethoxydim applied post controlled 91 to 98% late-season millet, but resulting soybean yields were less than the hand-weeded check. Fenoxaprop, fluazifop, fluazifop-P, haloxyfop, quizalofop, and sethoxydim applied late post provided 93 to 99% late-season millet control and soybean yields equal to hand-weeded checks. Wild-proso millet emerging after early post or post herbicide applications contributed to reduced effectiveness from those treatments. However, most wild-proso millet emerged before late post applications and were controlled. Other herbicides including BAS-51702, clethodim, cloproxydim, and SC-1084 applied late post also controlled wild-proso millet in soybeans.

Keywords

CGA-82725, 2-propynyl 2-[4-[(3,5-dichloro-2-pyridinyl)oxy]phenoxy]propionatepyridinyl]oxy] phenoxy]propanoic acidhaloxyfop, 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidquizalofop, (±)-2-[4-[(6-chloro-2-quinoxalinyl) oxy] phenoxy]propanoic acidSC-1084, 3-hydroxy-4-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]pentanoic acidsethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onesoybean, Glycine max (L.)Merr.Application timingBAS-51702CGA-82725clethodimcloproxydimfenoxapropfluazifophaloxyfopquizalofopSC-1084sethoxydimPANMI
Type
Symposium
Information
Weed Technology , Volume 4 , Issue 2 , June 1990 , pp. 420 - 424
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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