Abstract
The sunflower (Helianthus annuus L.) is an oleaginous plant that shows high suitability for cultivation in Brazil. However, the performance of the crop is influenced by factors such as weed interference, mainly because of the few selective herbicide options. Thus, the objective of this study was to evaluate weed control and selectivity of four pre-emergent herbicides applied to two sunflower cultivars in sandy and clayey soils. Two field experiments were conducted in a randomized block design with a 2 × 6 factorial scheme, two cultivars (CF 101 and M 734) and six treatments with S-metolachlor (1920 g a.i. ha−1), sulfentrazone (150 g a.i. ha−1), flumioxazin (40 g a.i. ha−1), and trifluralin (1780 g a.i. ha−1) and two controls, one with weeding and the other without weeding and without herbicide application, in soils with contrasting textures (sandy and clayey). No injury symptoms were observed in both cultivars, regardless of soil texture. The cultivar M 734 exhibited the highest values of the agronomic parameters evaluated. The treatment with flumioxazin provided control of more than 90% of the weeds in clayey soil and more than 64% in sandy soil. The yield of both cultivars was lower in the sandy soil. Thus, all herbicide treatments were selective for both cultivars tested, since they did not interfere with sunflower grain yield.
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Claims 6
Claim · model-written summary
Flumioxazin provided control of more than 90% of the weeds in clayey soil.
- Taxon
- sunflower
Helianthus annuuse0 - Treatment
- flumioxazine1
- Interactor
- weedse1weed
- Outcome
- controle1
- Direction
- increaseinferrede1
- Value
- more than 90%e1
- Setting
- clayey soile1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sunflower (Helianthus annuus L.)”
e1“The treatment with flumioxazin provided control of more than 90% of the weeds in clayey soil”
Claim · model-written summary
Flumioxazin provided control of more than 64% of the weeds in sandy soil.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- flumioxazine1
- Interactor
- weedse1weed
- Outcome
- controle1
- Direction
- increaseinferrede1
- Value
- more than 64%e1
- Setting
- sandy soile1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sunflower (Helianthus annuus L.)”
e1“The treatment with flumioxazin provided control of more than 90% of the weeds in clayey soil and more than 64% in sandy soil”
Claim · model-written summary
Sunflower yield of both cultivars was lower in sandy soil.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- yielde2
- Direction
- lowere2
- Setting
- sandy soile2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sunflower (Helianthus annuus L.)”
e2“The yield of both cultivars was lower in the sandy soil”
Claim · model-written summary
Cultivar M 734 had the highest values of the agronomic parameters evaluated.
- Taxon
- sunflowerHelianthus annuuse0
- Material
- M 734e3
- Outcome
- agronomic parameterse3
- Direction
- higheste3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sunflower (Helianthus annuus L.)”
e3“The cultivar M 734 exhibited the highest values of the agronomic parameters evaluated”
Claim · model-written summary
No injury symptoms were observed in sunflower cultivars, regardless of soil texture.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- injury symptomse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sunflower (Helianthus annuus L.)”
e4“No injury symptoms were observed in both cultivars, regardless of soil texture”
Claim · model-written summary
All herbicide treatments were selective for sunflower and did not interfere with grain yield.
- Taxon
- sunflowerHelianthus annuuse5
- Treatment
- herbicide treatmentse5
- Outcome
- grain yielde5
- Direction
- did not interferee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“all herbicide treatments were selective for both cultivars tested, since they did not interfere with sunflower grain yield”
The same questions in other papers
flumioxazin · control · Helianthus annuus (common sunflower)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
herbicide · yield · Helianthus annuus (common sunflower)Positive and negative results
12 papers in the same direction as this paper · 56 in the opposite direction
- positive
- positive
- positive
65 papers more in this group
See all 69 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.