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Herbicide Combinations for Preharvest Weed Desiccation in Early Maturing Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Jeffrey M. Ellis ,
David R. Shaw  and
William L. Barrentine
Jeffrey M. Ellis
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
David R. Shaw
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
William L. Barrentine
Affiliation:
Kumiai Mississippi Research Station, Kumiai Chemical Industry Company, LTD., 2830 Wilcox Road, Leland, MS 38756
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Abstract

Field experiments were conducted at three locations in Mississippi in 1995 and 1996 to evaluate labeled and alternative herbicides and herbicide combinations for weed desiccation prior to soybean harvest. Weeds evaluated included pitted morningglory, hemp sesbania, spotted spurge, common cocklebur, and sicklepod. Soybean yield and harvestable soybean losses were not affected by preharvest herbicide treatments, spray volume, or surfactant concentration. Soybean moisture was most consistently reduced by glufosinate compared to the untreated and other herbicides and herbicide combinations evaluated. Most desiccation treatments at Stoneville and Brooksville resulted in foreign material similar to the weed-free check. Glufosinate at 0.84, 1.1, and 1.4 kg ai/ha desiccated all weeds evaluated 90% or more with no differences among rates. The addition of 3.4 or 6.7 kg ai/ha sodium chlorate to 0.28 kg ai/ha paraquat, 1.1 and 2.2 kg ai/ha glyphosate, or 0.28 and 0.56 kg ai/ha oxyfluorfen increased desiccation of most weeds evaluated, with no difference between sodium chlorate rates. In some instances, reducing application volume from 281 to 94 L/ha improved pitted morningglory desiccation when 0.28 g/ha paraquat was applied alone. There were no differences between 0.25 and 0.50% (v/v) surfactant for most parameters evaluated.

Keywords

Glufosinate, 2-amino-4-(hydroxymethylphosphinyl)butanoic acidoxyfluorfen, 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzeneparaquat, 1,1'-dimethyl-4,4'-bipyridinium ionglyphosate, N-(phosphonomethyl)glycinesodium chloratecommon cocklebur, Xanthium strumarium L. # XANSThemp sesbania, Sesbania exaltata (Raf.) ex A. W. Hill # SEBEXpitted morningglory, Ipomoea lacunosa L. # IPOLAsicklepod, Senna obtusifolia (L.) Irwin and Barnaby # CASOBspotted spurge, Euphorbia maculata L. # EPHMAsoybean, Glycine max (L.) Merr. ‘NK 4260.’Harvest aidspray volumebromoxynilglufosinateglyphosateoxyfluorfenparaquatsodium chlorateCASOBEPHMAIPOLASEBEXXANSTDAT, days after treatment
Type
Research
Information
Weed Technology , Volume 12 , Issue 1 , March 1998 , pp. 157 - 165
Copyright
Copyright © 1997 by the Weed Science Society of America 

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