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Red Rice (Oryza sativa) and Echinochloa spp. Control in Texas Gulf Coast Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

José A. Noldin ,
James M. Chandler ,
Garry N. McCauley  and
John W. Sij JR.
José A. Noldin
Affiliation:
Department of Soil and Crop Science, Texas A&M University, College Station, TX 77843-2474
James M. Chandler
Affiliation:
Department of Soil and Crop Science, Texas A&M University, College Station, TX 77843-2474
Garry N. McCauley
Affiliation:
Texas A&M Agricultural Research and Extension Center, Eagle Lake, TX 77434
John W. Sij JR.
Affiliation:
Texas A&M Agricultural Research and Extension Center, Chillicothe-Vernon, TX 77713-8550
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Abstract

Field studies were conducted from 1992 to 1994 to evaluate herbicides applied preplant incorporated (PPI), preemergence (PRE), and postemergence (POST) for red rice and Echinochloa spp. control in soybean. Metolachlor PPI at 3.4 kg ai/ha controlled red rice late season 90 to 92%. Alachlor at 4.5 kg ai/ha and SAN 582H at 2.2 or 3.4 kg ai/ha, PPI or PRE, metolachlor plus imazaquin at 2.8 + 0.14 kg ai/ha PRE, and quizalofop-P POST at 0.07 kg ai/ha provided 83 to 95% red rice control in at least 2 of 3 yr. The addition of imazaquin to metolachlor or pendimethalin did not improve red rice control. Early-season Echinochloa spp. control with trifluralin, pendimethalin, and pendimethalin + imazaquin applied PPI; metolachlor, SAN 582H at 2.2 or 3.4 kg/ha, and metolachlor + imazaquin applied PPI or PRE; alachlor, AC 263,222 + imazaquin, and AC 263,222 + imazethapyr applied PRE; and sethoxydim and quizalofop-P applied POST was 90 to 100% in at least 2 of 3 yr. However, Echinochloa spp. control decreased for all treatments later in the season. Pendimethalin applied PPI at 2.2 kg ai/ha or in mixture with imazaquin at 1.7 + 0.14 kg ai/ha injured soybean 14 to 34% in 2 yr. Trifluralin PPI, SAN 582H at 2.2 or 3.4 kg/ha PPI or PRE, imazaquin PPI, metolachlor + imazaquin PPI or PRE, and AC 263,222 + imazethapyr injured soybean 12 to 41% in at least 1 of 3 yr.

Keywords

pendimethalin, N-(1-ethyl-propyl)-3,4-dimethyl-2,6-dinitrobenzenaminetrifluralin, 2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenaminebarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCGjunglerice, Echinochloa colona (L.) Link # ECHCOred rice, Oryza sativa L. # ORYSAsoybean, Glycine max (L.) Merr.AC 263,222alachlorclomazoneimazaquinimazethapyrmetolachlorpendimethalinquizalofop-PsethoxydimtrifluralinECHCGECHCOORYSAPOST, postemergencePPI, preplant incorporatedPRE, preemergenceWAP, weeks after plantingWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 12 , Issue 4 , December 1998 , pp. 677 - 683
Copyright
Copyright © 1998 by the Weed Science Society of America 

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