Abstract
A field trial was conducted in 1996 and 1997 to control speargrass (Imperata cylindrica (L) Raeuschel) for soybean production. The treatments comprised four levels of glyphosate, 1.08, 1.44, 1.80 and 2.16 kg ha−1, applied pre-tillage and followed by one hoe-weeding (HW) at 6 weeks after planting (WAP); fluazifop-butyl, 0.125, 0.25 and 0.375 kg ha−1, at 3WAP; 1HW at 3WAP; 2HW at 3 and 6WAP; and an unweeded control. Glyphosate and fluazifop-butyl controlled 57–85% and 51–83% respectively of I cylindrica compared with 64–67% by traditional hoe-weeding. The highest grain yield (1.88 t ha−1) was obtained from plots treated with glyphosate (1.44 kg ha−1) + 1HW. The highest profit, however, was obtained with fluazifop-butyl. It was unprofitable to apply glyphosate at rates higher than 1.44 kg ha−1 to control I cylindrica at 30 cm foliage. © 2000 Society of Chemical Industry
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Claims 5
Claim · model-written summary
Glyphosate controlled 57–85% of I cylindrica.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Glyphosatee1
- Interactor
- I cylindrica
Imperata cylindricae1weed - Outcome
- I cylindricae1
- Direction
- controllede1
- Value
- 57–85%e1
- Qualifier
- 64–67%e1
- Comparator
- traditional hoe-weedinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean production”
e1“Glyphosate and fluazifop-butyl controlled 57–85% and 51–83% respectively of I cylindrica compared with 64–67% by traditional hoe-weeding”
Claim · model-written summary
Fluazifop-butyl controlled 51–83% of I cylindrica.
- Taxon
- soybeanGlycine maxe0
- Treatment
- fluazifop-butyle1
- Interactor
- I cylindricaImperata cylindricae1weed
- Outcome
- I cylindricae1
- Direction
- controllede1
- Value
- 51–83%e1
- Qualifier
- 64–67%e1
- Comparator
- traditional hoe-weedinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean production”
e1“Glyphosate and fluazifop-butyl controlled 57–85% and 51–83% respectively of I cylindrica compared with 64–67% by traditional hoe-weeding”
Claim · model-written summary
Glyphosate at 1.44 kg ha−1 plus one hoe weeding gave the highest soybean grain yield of 1.88 t ha−1.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate (1.44 kg ha−1) + 1HWe1
- Outcome
- grain yielde1
- Direction
- higheste1
- Value
- 1.88 t ha−1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean production”
e1“The highest grain yield (1.88 t ha−1) was obtained from plots treated with glyphosate (1.44 kg ha−1) + 1HW”
Claim · model-written summary
Fluazifop-butyl produced the highest profit.
- Taxon
- soybeanGlycine maxe0
- Treatment
- fluazifop-butyle1
- Outcome
- profite1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean production”
e1“The highest profit, however, was obtained with fluazifop-butyl”
Claim · model-written summary
The authors consider glyphosate rates above 1.44 kg ha−1 unprofitable for controlling I cylindrica at 30 cm foliage.
- Taxon
- soybeanGlycine maxe0
- Interactor
- I cylindricaImperata cylindricae1weed
- Outcome
- unprofitable to apply glyphosate at rates higher than 1.44 kg ha−1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean production”
e1“It was unprofitable to apply glyphosate at rates higher than 1.44 kg ha−1 to control I cylindrica at 30 cm foliage”
The same questions in other papers
glyphosate · yield · Glycine max (soybean)Results differ
54 papers in the same direction as this paper · 57 in the opposite direction · 11 reporting no difference from an alternative
- no effect
- negative
- negative
119 papers more in this group
See all 123 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.