Abstract
Drift from pesticides can kill or damage nontarget organisms. In these studies, the effects of sublethal rates of the herbicide glyphosate applied prebloom, at bloom, and postbloom of the first flower cluster were evaluated in tomato ( Lycopersicon esculentum Mill.). As rates increased from 1 to 100 g·ha -1 , foliar injury and flower and fruit number per plant varied with the stage of development at the time of exposure and the time of evaluation after treatment. Plants treated with 60 and 100 g·ha -1 glyphosate prebloom and at bloom had developed moderate to severe foliar injury by 14 days after treatment, but phytotoxicity to plants treated postbloom was only mild to moderate. Blooms abscised from plants treated with 60 and 100 g·ha -1 glyphosate for several weeks after application and fruit set was reduced. Greatest yield losses occurred following treatment prebloom (just prior to bloom) and at bloom. Plants treated before emergence of flower buds, and more mature plants exposed when first cluster fruit were sizing, yielded better than did those treated just prior to bloom and at bloom. Chemical name used: N -(phosphonomethyl)glycine (glyphosate).
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Claims 8
Claim · model-written summary
Glyphosate-associated foliar injury varied with dose, exposure stage and evaluation time.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- 1 to 100 g·ha -1e0
- Outcome
- foliar injurye0
- Qualifier
- stage of development at the time of exposure and the time of evaluation after treatmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As rates increased from 1 to 100 g·ha -1 , foliar injury and flower and fruit number per plant varied with the stage of development at the time of exposure and the time of evaluation after treatment”
t0“Tomato”
Claim · model-written summary
Flower number varied with glyphosate dose, exposure stage and evaluation time.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 1 to 100 g·ha -1e0
- Outcome
- flowere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As rates increased from 1 to 100 g·ha -1 , foliar injury and flower and fruit number per plant varied with the stage of development at the time of exposure and the time of evaluation after treatment”
t0“Tomato”
Claim · model-written summary
Fruit number varied with glyphosate dose, exposure stage and evaluation time.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 1 to 100 g·ha -1e0
- Outcome
- fruit number per plante0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As rates increased from 1 to 100 g·ha -1 , foliar injury and flower and fruit number per plant varied with the stage of development at the time of exposure and the time of evaluation after treatment”
t0“Tomato”
Claim · model-written summary
Prebloom and bloom glyphosate at 60 and 100 g/ha caused moderate to severe foliar injury by day 14.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 60 and 100 g·ha -1 glyphosate prebloom and at bloome0
- Outcome
- moderate to severe foliar injurye0
- Direction
- severee0
- Qualifier
- 14 days after treatmente0
- Comparator
- plants treated postbloome0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants treated with 60 and 100 g·ha -1 glyphosate prebloom and at bloom had developed moderate to severe foliar injury by 14 days after treatment, but phytotoxicity to plants treated postbloom was only mild to moderate”
t0“Tomato”
Claim · model-written summary
Blooms abscised for several weeks after 60 and 100 g/ha glyphosate.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 60 and 100 g·ha -1 glyphosatee0
- Outcome
- Blooms abscisede0
- Qualifier
- several weeks after applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Blooms abscised from plants treated with 60 and 100 g·ha -1 glyphosate for several weeks after application and fruit set was reduced”
t0“Tomato”
Claim · model-written summary
Glyphosate at those doses reduced fruit set.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 60 and 100 g·ha -1 glyphosatee0
- Outcome
- fruit sete0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Blooms abscised from plants treated with 60 and 100 g·ha -1 glyphosate for several weeks after application and fruit set was reduced”
t0“Tomato”
Claim · model-written summary
Yield losses were greatest after prebloom and bloom treatment.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- treatment prebloom (just prior to bloom) and at bloome0
- Outcome
- yield lossese0
- Direction
- Greateste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greatest yield losses occurred following treatment prebloom (just prior to bloom) and at bloom”
t0“Tomato”
Claim · model-written summary
Treatment before buds or during first-fruit sizing yielded better than treatment just before or at bloom.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- before emergence of flower budse0
- Outcome
- yieldede0
- Direction
- bettere0
- Comparator
- just prior to bloom and at bloome0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants treated before emergence of flower buds, and more mature plants exposed when first cluster fruit were sizing, yielded better than did those treated just prior to bloom and at bloom”
t0“Tomato”
The same questions in other papers
glyphosate · yield · Solanum lycopersicum (tomato)Positive and negative results
9 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- negative
10 papers more in this group
See all 14 papers →glyphosate · crop injury · Solanum lycopersicum (tomato)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.