Abstract
The aim of this work was to determine the persistence of auxinic herbicides applied on tropical pasture and toxicity for succeeding crops. The herbicides were applied in an area of dystrophic red‒yellow latosol with pasture infested of weeds. At 40, 80, and 280 days after application of herbicide, the soil samples were collected at depths of 0 to 20 cm. Soil with residues of 2,4-D, 2,4-D + picloram, triclopyr, and a soil without herbicide application were analyzed with six replicates. Seven crops were cultivated in these soils: cucumber (Cucumis sativus L.), velvet bean [Mucuna pruriens (L.) DC.], pigeon pea [Cajanus cajan (L.) Millsp.], alfalfa (Medicago sativa L.), lablab bean [Lablab purpureus (L.) Sweet], corn (Zea mays L.), and sorghum [Sorghum bicolor (L.) Moench]. The plants of cucumber, pigeon pea, and alfalfa were the most susceptible to the auxinic herbicide residues. However, the lablab bean was the only one among the dicot evaluated that showed tolerance to the 2,4-D + picloram residual when cultivated in soils at 280 days after application of herbicide. Corn and sorghum showed lower chlorophyll content in soils with 2,4-D + picloram residual up to 80 days after application of herbicide.
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Claims 6
Claim · model-written summary
Cucumber was among the most susceptible plants to auxinic herbicide residues.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- auxinic herbicide residuese0
- Outcome
- most susceptiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants of cucumber, pigeon pea, and alfalfa were the most susceptible to the auxinic herbicide residues.”
Claim · model-written summary
Pigeon pea was among the most susceptible plants to auxinic herbicide residues.
- Taxon
- pigeon pea
Cajanus cajane0 - Treatment
- auxinic herbicide residuese0
- Outcome
- most susceptiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants of cucumber, pigeon pea, and alfalfa were the most susceptible to the auxinic herbicide residues.”
Claim · model-written summary
Alfalfa was among the most susceptible plants to auxinic herbicide residues.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- auxinic herbicide residuese0
- Outcome
- most susceptiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants of cucumber, pigeon pea, and alfalfa were the most susceptible to the auxinic herbicide residues.”
Claim · model-written summary
Lablab bean alone among evaluated dicots tolerated 2,4-D plus picloram residue at 280 days.
Verbatim
e0“However, the lablab bean was the only one among the dicot evaluated that showed tolerance to the 2,4-D + picloram residual when cultivated in soils at 280 days after application of herbicide.”
Claim · model-written summary
Corn had lower chlorophyll content in soil with 2,4-D plus picloram residue up to 80 days after application.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- 2,4-D + picloram residuale0
- Outcome
- chlorophyll contente0
- Direction
- lowere0
- Qualifier
- up to 80 days after application of herbicidee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn and sorghum showed lower chlorophyll content in soils with 2,4-D + picloram residual up to 80 days after application of herbicide.”
Claim · model-written summary
sorghum had lower chlorophyll content in soil with 2,4-D plus picloram residue up to 80 days after application.
- Treatment
- 2,4-D + picloram residuale0
- Outcome
- chlorophyll contente0
- Direction
- lowere0
- Qualifier
- up to 80 days after application of herbicidee0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn and sorghum showed lower chlorophyll content in soils with 2,4-D + picloram residual up to 80 days after application of herbicide.”
The same questions in other papers
2,4-D · physiology: pigments · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.