Weed Control and Selectivity of Four Herbicides Applied in Pre-Emergence on Two Sunflower Cultivars
The sunflower (<i>Helianthus annuus</i> 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...
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MDPI AG
2023-05-01
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| author | Elielton Germano dos Santos Miriam Hiroko Inoue Ana Carolina Dias Guimarães Jennifer Stefany Queiroz Bastos Kassio Ferreira Mendes |
| author_facet | Elielton Germano dos Santos Miriam Hiroko Inoue Ana Carolina Dias Guimarães Jennifer Stefany Queiroz Bastos Kassio Ferreira Mendes |
| author_sort | Elielton Germano dos Santos |
| collection | DOAJ |
| description | The sunflower (<i>Helianthus annuus</i> 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<sup>−1</sup>), sulfentrazone (150 g a.i. ha<sup>−1</sup>), flumioxazin (40 g a.i. ha<sup>−1</sup>), and trifluralin (1780 g a.i. ha<sup>−1</sup>) 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. |
| first_indexed | 2024-03-11T02:35:43Z |
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| language | English |
| last_indexed | 2024-03-11T02:35:43Z |
| publishDate | 2023-05-01 |
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| series | Crops |
| spelling | doaj.art-569d5d470a484a6cbe4fc10ddad7c22a2023-11-18T09:55:26ZengMDPI AGCrops2673-76552023-05-013213914710.3390/crops3020014Weed Control and Selectivity of Four Herbicides Applied in Pre-Emergence on Two Sunflower CultivarsElielton Germano dos Santos0Miriam Hiroko Inoue1Ana Carolina Dias Guimarães2Jennifer Stefany Queiroz Bastos3Kassio Ferreira Mendes4Departamento de Agronomia, Universidade do Estado de Mato Grosso, Tangará da Serra 78300-970, Mato Grosso, BrazilDepartamento de Agronomia, Universidade do Estado de Mato Grosso, Tangará da Serra 78300-970, Mato Grosso, BrazilDepartamento de Agronomia, Universidade do Estado de Mato Grosso, Alta Floresta 78580-000, Mato Grosso, BrazilDepartamento de Agronomia, Universidade do Estado de Mato Grosso, Tangará da Serra 78300-970, Mato Grosso, BrazilDepartamento de Agronomia, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, BrazilThe sunflower (<i>Helianthus annuus</i> 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<sup>−1</sup>), sulfentrazone (150 g a.i. ha<sup>−1</sup>), flumioxazin (40 g a.i. ha<sup>−1</sup>), and trifluralin (1780 g a.i. ha<sup>−1</sup>) 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.https://www.mdpi.com/2673-7655/3/2/14<i>Helianthus annuus</i> L.injury levelchemical controlsoil type |
| spellingShingle | Elielton Germano dos Santos Miriam Hiroko Inoue Ana Carolina Dias Guimarães Jennifer Stefany Queiroz Bastos Kassio Ferreira Mendes Weed Control and Selectivity of Four Herbicides Applied in Pre-Emergence on Two Sunflower Cultivars Crops <i>Helianthus annuus</i> L. injury level chemical control soil type |
| title | Weed Control and Selectivity of Four Herbicides Applied in Pre-Emergence on Two Sunflower Cultivars |
| title_full | Weed Control and Selectivity of Four Herbicides Applied in Pre-Emergence on Two Sunflower Cultivars |
| title_fullStr | Weed Control and Selectivity of Four Herbicides Applied in Pre-Emergence on Two Sunflower Cultivars |
| title_full_unstemmed | Weed Control and Selectivity of Four Herbicides Applied in Pre-Emergence on Two Sunflower Cultivars |
| title_short | Weed Control and Selectivity of Four Herbicides Applied in Pre-Emergence on Two Sunflower Cultivars |
| title_sort | weed control and selectivity of four herbicides applied in pre emergence on two sunflower cultivars |
| topic | <i>Helianthus annuus</i> L. injury level chemical control soil type |
| url | https://www.mdpi.com/2673-7655/3/2/14 |
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