Fungicide spray coverage and deposition in soybean asian rust management
At maximum vegetative growth, sprays with fungicide to control Asian rust (Phakopsora pachyrhizi Sydow and P. Sydow) should reach high canopy penetration and plant coverage. Therefore, the central objective of this study was to determine leaf area, spray deposition, and plant coverage by fungicides...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Uberlândia
2019-08-01
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| Series: | Bioscience Journal |
| Subjects: | |
| Online Access: | https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42323 |
| _version_ | 1818287776096845824 |
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| author | Giselle Feliciani Barbosa Maria Aparecida Pessôa da Cruz Centurion Marcelo da Costa Ferreira Pedro Luís da Costa Aguiar Alves |
| author_facet | Giselle Feliciani Barbosa Maria Aparecida Pessôa da Cruz Centurion Marcelo da Costa Ferreira Pedro Luís da Costa Aguiar Alves |
| author_sort | Giselle Feliciani Barbosa |
| collection | DOAJ |
| description |
At maximum vegetative growth, sprays with fungicide to control Asian rust (Phakopsora pachyrhizi Sydow and P. Sydow) should reach high canopy penetration and plant coverage. Therefore, the central objective of this study was to determine leaf area, spray deposition, and plant coverage by fungicides sprayed on soybeans as a function of sowing seasons and plant population densities with reduced doses of tebuconazole and azoxystrobin + cyproconazole. Field experiments were conducted in the 2009/2010 and 2010/2011 crop years, using a medium-cycle soybean cultivar MG/BR–46 (Conquista) under a natural infestation of Asian soybean rust. Leaf area (LA) and leaf area index (LAI) were measured at three developmental stages (V8, R2, and R4). Spray deposition and coverage were evaluated during the first fungicide spraying. As results, LAI decreased as plant population decreased. Despite the lower LAIs, smaller plant populations had no effect on spray deposition and plant coverage. Both fungicides presented similar depositions on all thirds when plants had lower development.
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| first_indexed | 2024-12-13T01:45:51Z |
| format | Article |
| id | doaj.art-159548ad07724d0e84a8de26e54d74b7 |
| institution | Directory Open Access Journal |
| issn | 1981-3163 |
| language | English |
| last_indexed | 2024-12-13T01:45:51Z |
| publishDate | 2019-08-01 |
| publisher | Universidade Federal de Uberlândia |
| record_format | Article |
| series | Bioscience Journal |
| spelling | doaj.art-159548ad07724d0e84a8de26e54d74b72022-12-22T00:03:38ZengUniversidade Federal de UberlândiaBioscience Journal1981-31632019-08-01355Fungicide spray coverage and deposition in soybean asian rust managementGiselle Feliciani Barbosa0Maria Aparecida Pessôa da Cruz Centurion1Marcelo da Costa Ferreira2Pedro Luís da Costa Aguiar Alves3Universidade Estadual de Mato Grosso do Sul (UEMS), Unidade Universitária de Cassilândia.Universidade Estadual Paulista Universidade Estadual Paulista Universidade Estadual Paulista At maximum vegetative growth, sprays with fungicide to control Asian rust (Phakopsora pachyrhizi Sydow and P. Sydow) should reach high canopy penetration and plant coverage. Therefore, the central objective of this study was to determine leaf area, spray deposition, and plant coverage by fungicides sprayed on soybeans as a function of sowing seasons and plant population densities with reduced doses of tebuconazole and azoxystrobin + cyproconazole. Field experiments were conducted in the 2009/2010 and 2010/2011 crop years, using a medium-cycle soybean cultivar MG/BR–46 (Conquista) under a natural infestation of Asian soybean rust. Leaf area (LA) and leaf area index (LAI) were measured at three developmental stages (V8, R2, and R4). Spray deposition and coverage were evaluated during the first fungicide spraying. As results, LAI decreased as plant population decreased. Despite the lower LAIs, smaller plant populations had no effect on spray deposition and plant coverage. Both fungicides presented similar depositions on all thirds when plants had lower development. https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42323Chemical controlSowing seasonLeaf area indexPhakopsora pachyrhizi Sydow and P. SydowPlant population |
| spellingShingle | Giselle Feliciani Barbosa Maria Aparecida Pessôa da Cruz Centurion Marcelo da Costa Ferreira Pedro Luís da Costa Aguiar Alves Fungicide spray coverage and deposition in soybean asian rust management Bioscience Journal Chemical control Sowing season Leaf area index Phakopsora pachyrhizi Sydow and P. Sydow Plant population |
| title | Fungicide spray coverage and deposition in soybean asian rust management |
| title_full | Fungicide spray coverage and deposition in soybean asian rust management |
| title_fullStr | Fungicide spray coverage and deposition in soybean asian rust management |
| title_full_unstemmed | Fungicide spray coverage and deposition in soybean asian rust management |
| title_short | Fungicide spray coverage and deposition in soybean asian rust management |
| title_sort | fungicide spray coverage and deposition in soybean asian rust management |
| topic | Chemical control Sowing season Leaf area index Phakopsora pachyrhizi Sydow and P. Sydow Plant population |
| url | https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42323 |
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