Abstract
The stimulating effect of a low dose of a substance considered to be toxic is known as hormesis. The aim of this work was to use dose-response curves to evaluate the hormesis effect provided by sub-doses of the herbicide 2,4-D choline salt on the productivity of cotton at different phenological stages. The experimental design was based on randomized blocks, with four repetitions and the treatments were distributed in a 9x3 factorial design, with nine fractions of the mean label dose of the herbicide 2,4-D choline salt formulation (0 (control); 0.4275; 0.855; 1.71; 3.42; 8.55; 17.1; 34.2 and 68.4 g a.e. ha−1) associated with three different phenological stage of cotton, namely: V4, B4 and C4. The plants were evaluated as to the main productive parameters of the cotton plant. When applied at the V4 stage, sub-doses of the herbicide 2,4-D choline salt negatively affect the cotton crop. Sub-doses between 0.82 and 2.23 g a.e. ha−1 of the herbicide 2,4-D choline salt applied at the B4 stage of cotton can increase all the productive variables of the crop. The productive aspects of cotton plants in the C4 stage were not influenced by the application of sub-doses of 2,4-D choline salt.
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Claims 3
Claim · model-written summary
2,4-D choline salt subdoses negatively affected cotton at V4.
- Taxon
- cotton
Gossypium hirsutume0 - Organ / stage
- V4 stagee0
- Treatment
- sub-doses of the herbicide 2,4-D choline salte0
- Outcome
- cotton crope0
- Direction
- negatively affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When applied at the V4 stage, sub-doses of the herbicide 2,4-D choline salt negatively affect the cotton crop.”
Claim · model-written summary
At B4, 0.82 to 2.23 g a.e. ha−1 of 2,4-D choline salt increased all cotton productivity variables.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- B4 stagee0
- Treatment
- Sub-doses between 0.82 and 2.23 g a.e. ha−1 of the herbicide 2,4-D choline salte0
- Outcome
- all the productive variables of the crope0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sub-doses between 0.82 and 2.23 g a.e. ha−1 of the herbicide 2,4-D choline salt applied at the B4 stage of cotton can increase all the productive variables of the crop.”
Claim · model-written summary
At C4, 2,4-D choline salt subdoses did not influence cotton productive aspects.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- C4 stagee0
- Treatment
- application of sub-doses of 2,4-D choline salte0
- Outcome
- productive aspects of cotton plantse0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The productive aspects of cotton plants in the C4 stage were not influenced by the application of sub-doses of 2,4-D choline salt.”
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2,4-D · organism · Gossypium hirsutum (cotton)Positive and negative results
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See all 35 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.