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Carbamothioate and Chloroacetamide Herbicides for Woolly Cupgrass (Eriochloa villosa) Control in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Joseph F. Schuh  and
R. Gordon Harvey
Joseph F. Schuh
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706
R. Gordon Harvey
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706
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Abstract

Field experiments were conducted to compare herbicides applied preplant incorporated (PPI), preplant incorporated/preemergence (PPI/PRE), and preplant incorporated/early postemergence (PPI/early POST) to control woolly cupgrass in corn. Although good early-season control of woolly cupgrass from PPI cycloate plus cyanazine, EPTC plus dietholate or SC-0058, and butylate plus cyanazine sometimes was observed, middle- and/or late-season control was often limited. Generally, better woolly cupgrass control and higher corn yields were obtained from split PPI/PRE applications rather than from single PPI applications of alachlor, metolachlor, and acetochlor. The highest and most consistent full-season woolly cupgrass control resulted when cycloate or EPTC plus dietholate applied PPI was followed by cyanazine plus either pendimethalin, alachlor, metolachlor, or acetochlor applied early POST. However, in 1989 adverse weather conditions near the early POST application timing injured corn and reduced yields.

Keywords

Acetochlor, 2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)acetamidealachlor, 2-chloro-N-(2,6-diethyl-phenyl)-N-(methoxymethyl)acetamidebutylate, S-ethyl bis(2-methylpropyl)carbamothioatecyanazine, 2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl)amino]-2-methylpropanenitrilecycloate, S-ethyl cyclohexylethylcarbamothioatedietholate, O,O-diethyl O-phenyl phosphorothioateEPTC, S-ethyl dipropyl carbamothioatemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidependimethalin, N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamineSC-0058, S-ethyl-N,N-bis(3-chloroallyl)carbamothioatecorn, Zea mays L.woolly cupgrass, Eriochloa villosa (Thunb.) Kunth ♯ ERBVISplit herbicide applicationacetochloralachloramidebutylatecyanazinecycloatedietholateEPTCmetolachlorpendimethalinSC-0058ERBVI
Type
Research
Information
Weed Technology , Volume 5 , Issue 2 , June 1991 , pp. 331 - 336
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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