Abstract
Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL. Glyphosate-Tms and glyphosate-isopropylamine (Ipa) at 1,120, 1,680, 2,240, 3,360, and 4,480 g ai/ha were applied at the V4 and R1 growth stages of glyphosate-resistant soybean. Glyphosate-Tms and glyphosate-Ipa caused greater chlorosis when applied at the R1 growth stage when compared with the V4 growth stage, and chlorosis increased with rate. Chlorosis ranged from 0 to 20% depending on the year. In 1998, glyphosate-Ipa at 2,240 and 3,360 g/ha applied at the R1 growth stage caused 4 to 5% more chlorosis than glyphosate-Tms at the same rates. In addition to chlorosis, glyphosate-Tms caused bleaching (white speckling) of soybean leaves, with bleaching increasing as glyphosate-Tms rate increased. Glyphosate-Ipa caused no bleaching, regardless of rate. Glyphosate-Tms and -Ipa caused no visible height reduction at 14 and 28 d after treatment in any year. In 1998 and 1999, glyphosate-Tms and -Ipa, at the highest rate applied at the R1 growth stage, increased days to maturity of soybean. Despite the injury and delay in maturity caused by glyphosate-Tms and -Ipa, there was no difference in grain yield across years because of glyphosate salt, rate, or application timing.Nomenclature: Glyphosate; soybean, Glycine max (L.) Merr. ‘Pioneer 94B01 RR’.Additional index words: Herbicide injury, postemergence, transgenic soybean.Abbreviations: DAT, days after treatment; EPSPS, 5-enolpyruvylshikimate-3-phosphate synthase; Ipa, isopropylamine; Tms, trimethylsulfonium.
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Claims 10
Claim · model-written summary
Glyphosate-Tms and glyphosate-Ipa caused greater chlorosis in soybean when applied at the R1 growth stage than at the V4 growth stage.
- Taxon
- soybean
Glycine maxe0 - Treatment
- applied at the R1 growth stagee1
- Outcome
- chlorosise1
- Direction
- greatere1
- Comparator
- V4 growth stagee1
- Setting
- Belleville, ILe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e1“Glyphosate-Tms and glyphosate-Ipa caused greater chlorosis when applied at the R1 growth stage when compared with the V4 growth stage”
Claim · model-written summary
Chlorosis in soybean increased with glyphosate rate.
- Taxon
- soybeanGlycine maxe0
- Treatment
- ratee2
- Outcome
- chlorosise2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e2“chlorosis increased with rate”
Claim · model-written summary
Chlorosis in soybean ranged from 0 to 20% depending on the year.
- Taxon
- soybeanGlycine maxe0
- Outcome
- Chlorosise3
- Value
- 0 to 20%e3
- Qualifier
- depending on the yeare3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e3“Chlorosis ranged from 0 to 20% depending on the year”
Claim · model-written summary
In 1998, glyphosate-Ipa at 2,240 and 3,360 g/ha at R1 caused 4 to 5% more chlorosis than glyphosate-Tms at the same rates.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate-Ipa at 2,240 and 3,360 g/ha applied at the R1 growth stagee4
- Outcome
- chlorosise4
- Direction
- moree4
- Value
- 4 to 5%e4
- Qualifier
- In 1998e4
- Comparator
- glyphosate-Tms at the same ratese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e4“In 1998, glyphosate-Ipa at 2,240 and 3,360 g/ha applied at the R1 growth stage caused 4 to 5% more chlorosis than glyphosate-Tms at the same rates”
Claim · model-written summary
Glyphosate-Tms caused bleaching (white speckling) of soybean leaves.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate-Tmse5
- Outcome
- bleaching (white speckling) of soybean leavese5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e5“glyphosate-Tms caused bleaching (white speckling) of soybean leaves”
Claim · model-written summary
Bleaching of soybean leaves increased with glyphosate-Tms rate.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate-Tms ratee6
- Outcome
- bleachinge6
- Direction
- increasinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e6“with bleaching increasing as glyphosate-Tms rate increased”
Claim · model-written summary
Glyphosate-Ipa caused no bleaching in soybean, regardless of rate.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Glyphosate-Ipae7
- Outcome
- bleachinge7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e7“Glyphosate-Ipa caused no bleaching, regardless of rate”
Claim · model-written summary
Glyphosate-Tms and glyphosate-Ipa caused no visible height reduction in soybean at 14 and 28 days after treatment.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Glyphosate-Tms and -Ipae1
- Outcome
- heighte1
- Direction
- reductione1
- Qualifier
- at 14 and 28 d after treatmente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e1“Glyphosate-Tms and -Ipa caused no visible height reduction at 14 and 28 d after treatment in any year”
Claim · model-written summary
Glyphosate-Tms and glyphosate-Ipa at the highest rate applied at R1 increased days to maturity of soybean in 1998 and 1999.
- Taxon
- soybeanGlycine maxe2
- Treatment
- at the highest rate applied at the R1 growth stagee2
- Outcome
- days to maturitye2
- Direction
- increasede2
- Qualifier
- In 1998 and 1999e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e2“In 1998 and 1999, glyphosate-Tms and -Ipa, at the highest rate applied at the R1 growth stage, increased days to maturity of soybean”
Claim · model-written summary
Glyphosate salt, rate and application timing made no difference in soybean grain yield across years.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate salt, rate, or application timinge3
- Outcome
- grain yielde3
- Direction
- no_changeinferrede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted from 1998 to 2000 to evaluate the effects of the trimethylsulfonium (Tms) salt of glyphosate on glyphosate-resistant soybean at Belleville, IL”
e3“there was no difference in grain yield across years because of glyphosate salt, rate, or application timing”
The same questions in other papers
stage · physiology: pigments · Glycine max (soybean)Positive and negative results
1 in the opposite direction
- positive
stage · phenology · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
1 paper more in this group
See all 5 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.