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Yellow Nutsedge (Cyperus esculentus) Control in Peanut (Arachis hypogaea) as Influenced by Method of Metolachlor Application

Published online by Cambridge University Press:  12 June 2017

W. James Grichar ,
A. Edwin Colburn  and
Paul A. Baumann
W. James Grichar
Affiliation:
Texas Agric. Exp. Stn., Yoakum, TX 77995
A. Edwin Colburn
Affiliation:
Texas Agric. Ext. Serv., College Station, TX 77843
Paul A. Baumann
Affiliation:
Texas Agric. Ext. Serv., College Station, TX 77843
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Abstract

Field studies conducted from 1989 through 1991 evaluated methods of metolachlor application including POST followed by irrigation for yellow nutsedge control and peanut response. Metolachlor PPI stunted peanut in two of three years while metolachlor applied at emergence, 10, 20, or 30 days after peanut emergence (DAE) caused no peanut injury. Metolachlor 20 DAE provided > 95% yellow nutsedge control. Metolachlor soil-applied and again POST controlled yellow nutsedge at least 70%; however, some peanut stunting was noted. Bentazon plus metolachlor at 2.24 kg ai/ha controlled yellow nutsedge at least 92% when applied 30 DAE. Peanut yields were consistently the highest with metolachlor PRE at 1.40 kg ai/ha followed by a POST application of 1.40 kg ai/ha at 45 DAE.

Keywords

Bentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxidemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamideyellow nutsedge, Cyperus esculentus L. # CYPESpeanut, Arachis hypogaea L. ‘Florunner.’GroundnutCypes
Type
Research
Information
Weed Technology , Volume 10 , Issue 2 , June 1996 , pp. 278 - 281
Copyright
Copyright © 1996 by the Weed Science Society of America 

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