Abstract
A field study was conducted during 2000 and 2001 at Stoneville, MS, to determine the effects of isopropylamine, trimethylsulfonium (Tms), diammonium, and aminomethanamide dihydrogen tetraoxosulfate (Adt) salt formulations of glyphosate on weed control, growth, chlorophyll content, nodulation, nitrogen content, and grain yield in glyphosate-resistant soybean and to assess potential glyphosate accumulation in soybean nodules. Glyphosate-Tms and glyphosate-Adt injured soybean, and visible injury ranged from 29 to 38% 2 d after late postemergence (LPOST) application; however, soybean recovered by 14 d. Glyphosate formulations had no effect on chlorophyll content, root and shoot dry weight, or nodule number but reduced nodule biomass by 21 to 28% 14 d LPOST. Glyphosate levels in nodules from treated plants ranged from 39 to 147 ng g−1 (dry weight), and leghemoglobin content was reduced by as much as 10%. Control of five predominant weed species 14 d after LPOST was > 83% with one application and > 96% with two applications regardless of the glyphosate salts used. Soybean yields were generally higher with two applications than with one application regardless of glyphosate formulation. These results indicate that soybean injury and inhibition of nodule development with certain glyphosate formulations can occur, but soybean has the potential to recover from glyphosate stress.
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Claims 9
Claim · model-written summary
Glyphosate-Tms and glyphosate-Adt injured soybean, with visible injury of 29 to 38% 2 d after late postemergence application.
- Taxon
- soybean
Glycine maxe1 - Treatment
- Glyphosate-Tms and glyphosate-Adte1
- Outcome
- visible injurye1
- Direction
- injurede1
- Value
- 29 to 38%e1
- Qualifier
- 2 d after late postemergence (LPOST) applicatione1
- Setting
- Stoneville, MSe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted during 2000 and 2001 at Stoneville, MS”
e1“Glyphosate-Tms and glyphosate-Adt injured soybean, and visible injury ranged from 29 to 38% 2 d after late postemergence (LPOST) application”
Claim · model-written summary
Soybean recovered from the glyphosate injury by 14 d.
- Taxon
- soybeanGlycine maxe1
- Outcome
- recoverede1
- Qualifier
- 14 de1
- Setting
- Stoneville, MSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted during 2000 and 2001 at Stoneville, MS”
e1“soybean recovered by 14 d”
Claim · model-written summary
Glyphosate formulations had no effect on chlorophyll content, root and shoot dry weight, or nodule number in soybean.
- Taxon
- soybeanGlycine maxe2
- Treatment
- Glyphosate formulationse1
- Outcome
- chlorophyll content, root and shoot dry weight, or nodule numbere1
- Direction
- no effecte1
- Setting
- Stoneville, MSe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted during 2000 and 2001 at Stoneville, MS”
e1“Glyphosate formulations had no effect on chlorophyll content, root and shoot dry weight, or nodule number but reduced nodule biomass by 21 to 28% 14 d LPOST”
e2“glyphosate-resistant soybean”
Claim · model-written summary
Glyphosate formulations reduced soybean nodule biomass by 21 to 28% 14 d after LPOST application.
- Taxon
- soybeanGlycine maxe2
- Organ / stage
- nodulee1
- Treatment
- Glyphosate formulationse1
- Outcome
- nodule biomasse1
- Direction
- reducede1
- Value
- 21 to 28%e1
- Qualifier
- 14 d LPOSTe1
- Setting
- Stoneville, MSe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted during 2000 and 2001 at Stoneville, MS”
e1“Glyphosate formulations had no effect on chlorophyll content, root and shoot dry weight, or nodule number but reduced nodule biomass by 21 to 28% 14 d LPOST”
e2“glyphosate-resistant soybean”
Claim · model-written summary
Glyphosate levels in soybean nodules from treated plants ranged from 39 to 147 ng g-1 dry weight.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- nodulese1
- Outcome
- Glyphosate levels in nodulese1
- Value
- 39 to 147 ng g−1 (dry weight)e1
- Qualifier
- from treated plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glyphosate-resistant soybean”
e1“Glyphosate levels in nodules from treated plants ranged from 39 to 147 ng g−1 (dry weight)”
Claim · model-written summary
Leghemoglobin content in soybean nodules of treated plants was reduced by as much as 10%.
- Taxon
- soybeanGlycine maxe0
- Treatment
- treated plantse1
- Outcome
- leghemoglobin contente1
- Direction
- reducede1
- Value
- as much as 10%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glyphosate-resistant soybean”
e1“Glyphosate levels in nodules from treated plants ranged from 39 to 147 ng g−1 (dry weight), and leghemoglobin content was reduced by as much as 10%”
Claim · model-written summary
One glyphosate application gave weed control above 83% for five predominant weed species at 14 d after LPOST.
- Taxon
- soybeanGlycine maxe0
- Treatment
- one applicatione1
- Interactor
- five predominant weed speciese1weed
- Outcome
- Control of five predominant weed speciese1
- Direction
- higherinferrede1
- Value
- > 83%e1
- Qualifier
- 14 d after LPOSTe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glyphosate-resistant soybean”
e1“Control of five predominant weed species 14 d after LPOST was > 83% with one application and > 96% with two applications regardless of the glyphosate salts used”
Claim · model-written summary
Two glyphosate applications gave weed control above 96% for five predominant weed species at 14 d after LPOST, higher than one application.
- Taxon
- soybeanGlycine maxe0
- Treatment
- two applicationse1
- Interactor
- five predominant weed speciese1weed
- Outcome
- Control of five predominant weed speciese1
- Direction
- higherinferrede1
- Value
- > 96%e1
- Qualifier
- 14 d after LPOSTe1
- Comparator
- one applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glyphosate-resistant soybean”
e1“Control of five predominant weed species 14 d after LPOST was > 83% with one application and > 96% with two applications regardless of the glyphosate salts used”
Claim · model-written summary
Soybean yields were generally higher with two glyphosate applications than with one, regardless of glyphosate formulation.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- two applicationse0
- Outcome
- yieldse0
- Direction
- highere0
- Qualifier
- regardless of glyphosate formulatione0
- Comparator
- one applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yields were generally higher with two applications than with one application regardless of glyphosate formulation”
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See all 13 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.