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 herbi- cide 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 differ- ences between 0.25 and 0.50% (v/v) surfactant for most parameters evaluated. Nomenclature: Glufosinate, 2-amino-4-(hydroxymethylphosphinyl)butanoic acid; oxyfluorfen, 2- chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene; paraquat, 1,1'-dimethyl-4,4'-bipyri- dinium ion; glyphosate, N-(phosphonomethyl)glycine; sodium chlorate; common cocklebur, Xanthium strumarium L. #3 XANST; hemp sesbania, Sesbania exaltata (Raf.) ex A. W. Hill # SEBEX; pitted morningglory, Ipomoea lacunosa L. # IPOLA; sicklepod, Senna obtusifolia (L.) Irwin and Barnaby # CASOB; spotted spurge, Euphorbia maculata L. # EPHMA; soybean, Glycine max (L.) Merr. 'NK 4260.'
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Claims 7
Claim · model-written summary
Preharvest treatments did not affect soybean yield or harvestable losses.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- preharvest herbicide treatmentse0
- Outcome
- Soybean yield and harvestable soybean lossese0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yield and harvestable soybean losses were not affected by preharvest herbicide treatments, spray volume, or surfactant concentration.”
Claim · model-written summary
Glufosinate most consistently reduced soybean moisture.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- glufosinatee0
- Outcome
- Soybean moisturee0
- Direction
- reducede0
- Comparator
- the untreated and other herbicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean moisture was most consistently reduced by glufosinate compared to the untreated and other herbicides”
Claim · model-written summary
Most desiccation treatments yielded foreign material similar to the weed-free check.
Verbatim
e0“Most desiccation treatments at Stoneville and Brooksville resulted in foreign material similar to the weed-free check.”
t0“Herbicide Combinations for Preharvest Weed Desiccation in Early Maturing”
Claim · model-written summary
Glufosinate at the tested rates desiccated all evaluated weeds at least 90%, without rate differences.
Verbatim
e0“Glufosinate at 0.84, 1.1, and 1.4 kg ai/ha desiccated all weeds evaluated 90% or more with no differences among rates.”
t0“Herbicide Combinations for Preharvest Weed Desiccation in Early Maturing”
Claim · model-written summary
Adding sodium chlorate increased desiccation of most weeds without differences between its rates.
Verbatim
e0“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.”
t0“Herbicide Combinations for Preharvest Weed Desiccation in Early Maturing”
Claim · model-written summary
Reducing spray volume sometimes improved pitted morningglory desiccation with paraquat.
Verbatim
e0“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.”
t0“Herbicide Combinations for Preharvest Weed Desiccation in Early Maturing”
Claim · model-written summary
Surfactant concentration did not differ for most evaluated parameters.
Verbatim
e0“There were no differ- ences between 0.25 and 0.50% (v/v) surfactant for most parameters evaluated.”
t0“Herbicide Combinations for Preharvest Weed Desiccation in Early Maturing”
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