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Control of Triazine-Resistant Kochia (Kochia scoparia) in Sorghum (Sorghum bicolor)

Published online by Cambridge University Press:  12 June 2017

Gail A. Wicks ,
Alex R. Martin ,
Alan E. Haack  and
Garold W. Mahnken
Gail A. Wicks
Affiliation:
Univ. Nebraska, Dep. Agron., West Cent. Res. and Ext. Center, North Platte, NE 69101
Alex R. Martin
Affiliation:
Univ. Nebraska, Dep. Agron., West Cent. Res. and Ext. Center, North Platte, NE 69101
Alan E. Haack
Affiliation:
Univ. Nebraska, Dep. Agron., West Cent. Res. and Ext. Center, North Platte, NE 69101
Garold W. Mahnken
Affiliation:
Univ. Nebraska, Dep. Agron., West Cent. Res. and Ext. Center, North Platte, NE 69101
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Abstract

Herbicidal control of triazine-resistant (TR) kochia was evaluated in no-till grain sorghum. Herbicides were applied early preplant (EPP) or POST. In EPP experiments, herbicides plus nonionic surfactant at 0.25% v/v were applied 7, 2, or 0 wk before planting (WBP). Fluorochloridone at 0.8 kg ai/ha applied 7 or 2 WBP, pyridate at 1.0 kg ai/ha applied 2 WBP, and paraquat at 0.4 kg ai/ha applied 0 WBP controlled 94 to 99% of TR kochia; a prepackaged mixture of glyphosate plus 2,4-D at 0.3 plus 0.6 kg ae/ha and paraquat at 0.4 kg/ha applied 7 or 2 WBP controlled 71 to 82% of TR kochia; and 2,4-D ester at 0.6 kg ae/ha applied 2 WBP controlled 75% of TR kochia. Linuron at 0.8 kg ai/ha and atrazine at 2.2 kg ai/ha were ineffective. In the POST herbicide experiments, where paraquat plus metolachlor at 0.6 plus 1.7 kg ai/ha were applied 17 d before planting, various combinations and rates of bentazon plus atrazine, bromoxynil, and dicamba with adjuvants provided good control of TR kochia that was less than 8 cm tall.

Keywords

Atrazine, 6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diaminebentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxidebromoxynil, 3,5-dibromo-4-hydroxybenzonitriledicamba, 3,6-dichloro-2-methoxybenzoic acidfluorochloridone, 3-chloro-4-(chloromethyl)-1-[3-(trifluoromethyl)phenyl)]-2-pyrrolidinoneglyphosate, N-(phosphonomethyl)glycinelinuron, N′-(3,4-dichlorophenyl)-N-methoxy-N-methylureametolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamideparaquat, 1,1′-dimethyl-4,4′-bipyridinium ionpyridate, O-(6-chloro-3-phenyl-4-pyridazinyl)-5-octylcarbonothioate2,4-D, (2,4-dichlorophenoxy)acetic acidkochia, Kochia scoparia (L.) Schrad. ♯ KCHSCgrain sorghum, Sorghum bicolor (L.) Moench, ‘NK-2030,’ and ‘Funks G-550.’Conservation tillageecofallowherbicide resistanceno-tillatrazinebentazonbromoxynilfluorochloridoneglyphosateparaquatpyridateKCHSC
Type
Research
Information
Weed Technology , Volume 8 , Issue 4 , December 1994 , pp. 748 - 753
Copyright
Copyright © 1994 Weed Science Society of America 

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References

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