Abstract
Glyphosate-resistant (GR) maize is dominant in countries where it is grown. Significant, adverse effects of glyphosate application to GR maize have been reported, but few data from robust studies exist to determine if such effects are common. In this study, the effects of recommended application rates (single and sequential applications) were used on GR maize grown at two locations for one season and for two seasons in a third location. No significant effects of glyphosate on mineral content (N, P, K, Ca, Mg, S, Cu, Fe, Mn, and Zn) in leaves or grain, plant height, stem diameter, ear parameters, or yield were found at any location or in any growing season. Likewise, harvested grain quality, as determined by percent starch, protein, and total lipids, was unaffected by glyphosate treatment at any location. Neither glyphosate nor aminomethylphosphonic acid, the primary degradation product of glyphosate, were found in grain from any treatment at any location, except for 20 ng g−1 of glyphosate found in grain from one season at one location. These results support the view that recommended applications of glyphosate have no significant effects on growth, grain composition, mineral content, grain quality, nor yield of GR maize.
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Claims 4
Claim · model-written summary
Glyphosate had no significant effect on leaf or grain mineral content.
- Treatment
- glyphosatee0
- Outcome
- mineral content (N, P, K, Ca, Mg, S, Cu, Fe, Mn, and Zn) in leaves or graine0
- Direction
- No significant effectse0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Glyphosate-Resistant Maize”
e0“No significant effects of glyphosate on mineral content (N, P, K, Ca, Mg, S, Cu, Fe, Mn, and Zn) in leaves or grain”
Claim · model-written summary
Glyphosate had no significant effect on plant height, stem diameter, ear parameters, or yield.
- Treatment
- glyphosatee0
- Outcome
- plant height, stem diameter, ear parameters, or yielde0
- Direction
- No significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Glyphosate-Resistant Maize”
e0“No significant effects of glyphosate on mineral content (N, P, K, Ca, Mg, S, Cu, Fe, Mn, and Zn) in leaves or grain, plant height, stem diameter, ear parameters, or yield”
Claim · model-written summary
Glyphosate did not affect harvested grain starch, protein, or total lipid percentages.
- Treatment
- glyphosate treatmente0
- Outcome
- percent starch, protein, and total lipidse0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Glyphosate-Resistant Maize”
e0“harvested grain quality, as determined by percent starch, protein, and total lipids, was unaffected by glyphosate treatment at any location”
Claim · model-written summary
Neither glyphosate nor its degradation product was detected in grain except for one glyphosate detection.
- Organ / stage
- graine0
- Outcome
- glyphosate nor aminomethylphosphonic acide0
- Value
- 20 ng g−1e0
- Qualifier
- one season at one locatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Glyphosate-Resistant Maize”
e0“Neither glyphosate nor aminomethylphosphonic acid, the primary degradation product of glyphosate, were found in grain from any treatment at any location, except for 20 ng g−1 of glyphosate found in grain from one season at one location”
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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.