Abstract
The objective of this study was to evaluate the residual effect of glyphosate and 2.4-D herbicides in the initial development of the soy crop in a Yellow Red Latosol. The experiment was conducted in randomized design, consisting of 4 different doses of herbicides (0, 1, 2 and 5 times the recommended dose of the glyphosate and 2.4-D mixture), applied at intervals of 0, 3, 7 and 10 days before sowing, with 4 repetitions on a soybean culture (Monsoy 8372rr cultivar) performed up to 28 days after sowing, at 7 days intervals. The variables analyzed were plant height, leaf area, phytotoxicity, aerial dry biomass, root dry biomass and chlorophylls a and b, the latter being performed from the second evaluation after sowing. For the conditions evaluated, plant height, leaf area and aerial dry biomass were lower in the plants that received the highest doses of the glyphosate mixture and 2.4-D. The higher doses of glyphosate and 2.4-D resulted in higher symptoms of phytotoxicity in transgenic soy plants. The periods of application of the glyphosate herbicide mixture plus 2.4-D closer to the date of sowing of the soybean were the ones that most harmed the development of the crop. Key words: Transgenic soy, phytotoxicity, initial development.
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Claims 3
Claim · model-written summary
Highest herbicide doses reduced soybean plant height, leaf area and aerial dry biomass.
- Taxon
- soybean
Glycine maxt0 - Treatment
- highest doses of the glyphosate mixture and 2.4-De0
- Outcome
- plant height, leaf area and aerial dry biomasse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height, leaf area and aerial dry biomass were lower in the plants that received the highest doses of the glyphosate mixture and 2.4-D.”
t0“soybean”
Claim · model-written summary
Higher glyphosate and 2,4-D doses increased phytotoxicity in transgenic soy.
- Taxon
- soye0
- Treatment
- higher doses of glyphosate and 2.4-De0
- Outcome
- symptoms of phytotoxicitye0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“The higher doses of glyphosate and 2.4-D resulted in higher symptoms of phytotoxicity in transgenic soy plants.”
Claim · model-written summary
Applications closer to sowing harmed soybean development most.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate herbicide mixture plus 2.4-D closer to the date of sowinge0
- Outcome
- development of the crope0
- Direction
- most harmede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The periods of application of the glyphosate herbicide mixture plus 2.4-D closer to the date of sowing of the soybean were the ones that most harmed the development of the crop.”
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