Eficácia do herbicida oxyfluorfen com a cobertura de palha no controle de plantas daninhas
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Data
2009-03-01
Autores
Negrisoli, E. [UNESP]
Correa, M. R. [UNESP]
Rossi, C. V. S. [UNESP]
Carbonari, Caio Antonio [UNESP]
Velini, Edivaldo Domingues [UNESP]
Perim, L. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira da Ciência das Plantas Daninhas
Resumo
A palha pode alterar a dinâmica do herbicida oxyfluorfen no sistema de cana-crua; assim, este trabalho teve por objetivo avaliar a eficácia do oxyfluorfen em condições de casa de vegetação, com a cobertura de palha, no controle das plantas daninhas que ocorrem em cana-crua. Foram avaliadas as espécies de Brachiaria decumbens, Ipomoea grandifolia, Ipomoea quamoclit e Merremia cissoides. A dose utilizada do oxyfluorfen foi de 3 L ha-1 (720 g i.a. ha-1). Os tratamentos constaram de diferentes posicionamentos do herbicida e condições antes e após a aplicação. A porcentagem de controle das plantas daninhas foi avaliada aos 12, 20, 26, 33 e 38 DAA. Os maiores índices de controle aos 38 DAA, independentemente da planta daninha estudada, foram alcançados quando se aplicou oxyfluorfen em tratamentos com a presença de palha em cobertura, com ou sem umidade. No entanto, os resultados obtidos nos demais tratamentos mostraram-se eficientes no controle das diferentes espécies de plantas daninhas estudadas.
Straw can change the dynamics of the herbicide oxyfluorfen in the raw sugarcane system. Thus, this study aimed to assess the effectiveness of oxyfluorfen with straw cover in controlling weeds in raw sugarcane under greenhouse conditions. The species Brachiaria decumbens, Ipomoea grandifolia, Ipomoea quamoclit and Merremia cissoids were evaluated and the dose used was oxyfluorfen 3 L ha-1 (720 g .i.a. ha-1). Treatments consisted of different herbicide positions and conditions before and after application. Weed control percentage was evaluated at 12, 20, 26, 33 and 38 DAA. The highest control rates at 38 DAA, regardless of the weed studied, were reached when oxyfluorfen was applied in treatments with the cover straw, with or without humidity. However, the results obtained in the other treatments were effective in controlling the different weed species studied.
Straw can change the dynamics of the herbicide oxyfluorfen in the raw sugarcane system. Thus, this study aimed to assess the effectiveness of oxyfluorfen with straw cover in controlling weeds in raw sugarcane under greenhouse conditions. The species Brachiaria decumbens, Ipomoea grandifolia, Ipomoea quamoclit and Merremia cissoids were evaluated and the dose used was oxyfluorfen 3 L ha-1 (720 g .i.a. ha-1). Treatments consisted of different herbicide positions and conditions before and after application. Weed control percentage was evaluated at 12, 20, 26, 33 and 38 DAA. The highest control rates at 38 DAA, regardless of the weed studied, were reached when oxyfluorfen was applied in treatments with the cover straw, with or without humidity. However, the results obtained in the other treatments were effective in controlling the different weed species studied.
Descrição
Palavras-chave
cana-de-açúcar, palha, planta daninha, sugarcane, straw, weed
Como citar
Planta Daninha. Sociedade Brasileira da Ciência das Plantas Daninhas , v. 27, n. 1, p. 197-203, 2009.