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Weed Control in Soybean (Glycine max) with Flumetsulam, Cloransulam, and Diclosulam

Published online by Cambridge University Press:  12 June 2017

David R. Shaw ,
Andrew C. Bennett  and
Donald L. Grant
David R. Shaw*
Affiliation:
Mississippi State University, Mississippi State, MS 39762
Andrew C. Bennett
Affiliation:
Mississippi State University, Mississippi State, MS 39762
Donald L. Grant
Affiliation:
Dow AgroSciences, 1485 Single Tree Road, Hernando, MS 38632
*
Corresponding author: David R. Shaw, Mississippi Stale University, Department of Plant and Soil Sciences, Box 9555, Mississippi State, MS 39762; E-mail: dshaw@weedscience.msstate.edu.
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Abstract

Cloransulam postemergence (POST), diclosulam preemergence (PRE), and flumetsulam preplant incorporated (PPI) and POST were evaluated in six trials at two locations for control of sicklepod and pitted morningglory in soybean. Sicklepod control with cloransulam plus flumetsulam POST was equivalent to chlorimuron POST in seven of eight comparisons both 3 and 6 wk after treatment. Sicklepod control with cloransulam POST was equivalent to chlorimuron in only three of eight comparisons 3 wk after treatment, but late-season control was equivalent in five of six comparisons. Pitted morningglory control with cloransulam alone or in tank-mixture with flumetsulam POST was equivalent to chlorimuron in all comparisons. Control of sicklepod and pitted morningglory was greater in most comparisons when a POST application followed flumetsulam plus trifluralin PPI compared to only trifluralin PPI. In a total PRE stale seedbed system, where all treatments were tank-mixed with pendimethalin plus glyphosate, sicklepod control with all rates of flumetsulam and 26 or 35 g ai/ha diclosulam was equivalent to the standard treatment of imazaquin or metribuzin plus chlorimuron. None of the total PRE programs controlled sicklepod as well as when glyphosate was applied sequentially POST. Pitted morningglory was controlled 83 to 93% with 26 or 35 g/ha diclosulam, equivalent to imazaquin, metribuzin plus chlorimuron, or sequential glyphosate applications 8 wk after the PRE application. Increasing flumetsulam rate increased pitted morningglory control early season, but flumetsulam was not as effective as the other herbicides.

Keywords

glyphosate, N-(phosphonomethyl)glycinepitted morningglory, Ipomoea lacunosa L. ♯ IPOLAsicklepod, Senna obtusifolia (L.) Irwin and Barneby ♯ CASOBsoybean, Glycine max (L.) Merr.Stale seedbedchlorimuronimazaquinmetribuzinpendimethalintrifluralinIpomoea lacunosaSenna obtusifoliaIPOLACASOBPOST, postemergencePPI, preplant incorporatedPRE, preemergence
Type
Research
Information
Weed Technology , Volume 13 , Issue 4 , December 1999 , pp. 791 - 798
Copyright
Copyright © 1999 by the Weed Science Society of America 

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References

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