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Agrarian
Article . 2011
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Intervalos de chuva sobre a eficácia de controle químico de trapoeraba (Commelina benghalensis)

Authors: Silva, Ferdinando Marcos Lima; Velini, Edivaldo Domingues; Rossi, Caio Vitagliano Santi; Corrêa, Marcelo Rocha; Negrisoli, Eduardo; Carbonari, Caio Antonio;

Intervalos de chuva sobre a eficácia de controle químico de trapoeraba (Commelina benghalensis)

Abstract

Objetivou-se avaliar a influência de intervalos sem chuva após a aplicação de misturas de carfentrazone e glyphosate na eficácia de controle sobre Commelina benghalensis. O delineamento experimental foi inteiramente casualizado com 11 tratamentos, sendo duas dosagens da mistura carfentrazone-ethyl + glyphosate, 30 + 960 (com aplicação sequencial aos 21 DAA da mistura 20 + 960 g ha-1) e 50 + 960 g ha-1 de i.a e cinco intervalos de precipitação 0, 3, 6, 12 e 24 horas após a aplicação (HAA), com quatro repetições, sendo uma testemunha absoluta. A mistura foi aplicada em pós-emergência, em seguida realizou-se simulações de chuva nos intervalos predeterminados. Foram feitas avaliações visuais da eficácia de controle (0 a 100 %) aos 7, 14, 21, 28, 35 e 42 DAA.Os resultados foram submetidos à análise de variância pelo teste F e as médias comparadas pelo teste t em nível de 10 % de probabilidade. Observou-se que a aplicação dos herbicidas carfentrazone + glyphosate nas doses avaliadas e mesmo na aplicação seqüencial não apresentaram controle da C. benghalensis. Os resultados com a segunda aplicação são superiores à aplicação única, sendo a melhor absorção da mistura de carfentrazone + glyphosate pela C. benghalensis quando há um maior intervalo entre a aplicação e ocorrência de chuva e que é necessário intervalo mínimo de 6 HAA para o controle intermediário da C. benghalensis.

Country
Brazil
Keywords

S, Rain, Planta daninha, Herbicida, Agriculture, Herbicide, Weed, Chuva, herbicida, planta daninha, chuva

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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