Effect of Insecticides and Herbicides Applied to Soil on the Development of Plant Diseases: Ii. Early Blight and Fusarium Wilt of Tomato

Richardson, L. T.

doi:10.4141/cjps59-004

Cited by 32 publications

(13 citation statements)

References 2 publications

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“…A ação de inseticidas utilizados no controle de pragas sobre algumas doenças já havia sido verificada anteriormente. Richardson (1959) observou que aplicações de aldrin e endrin no solo reduziram a murcha do tomateiro, causada por Fusarium oxysporum f. sp. lycopersici e que aldrin, dieldrin e endrin diminuíram a incidência foliar de Alternaria solani Sorauer.…”

Section: Resultsunclassified

Efeito da aplicação de thiamethoxam para o controle do tripes na redução da severidade da verrugose do amendoim

Moraes¹,

Moraes²,

Lourenção³

et al. 2006

Fitopatol. bras.

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da aplicação de thiamethoxam para controle do tripes na redução da severidade da verrugose do amendoim. Fitopatologia Brasileira 31: 164-170. 2006. RESUMOA relação entre a aplicação do thiamethoxam para o controle do tripes e a severidade da verrugose foi verificada em experimentos instalados em Campinas e Pindorama, em 2001/2002, no esquema de parcelas subdivididas. As parcelas corresponderam aos tratamentos, com e sem controle do tripes com thiamethoxam e as subparcelas aos seis cultivares de amendoim, IAC-Tatu-ST, IAC-5, IAC-22 (eretos, de ciclo curto), Runner IAC-886, Tégua e IAC-Caiapó (rasteiros, de ciclo longo). Foram utilizadas as avaliações de número de tripes por folíolo e nota de sintomas obtidos aos 56 e 57 dias do plantio, em Campinas e Pindorama, quando foram registradas as maiores populações do inseto nesses locais. A severidade da verrugose foi avaliada aos 79 e 91 dias após o plantio, em Campinas e Pindorama, respectivamente, através de escala de notas baseada nos sintomas exibidos nas hastes e pecíolos. Os resultados mostraram a eficiência do inseticida thiamethoxam no controle do tripes em todos os cultivares. Nos dois locais observou-se a redução na severidade da verrugose, quando foi aplicado o thiamethoxam. A severidade da verrugose foi maior nos cultivares de porte ereto, com o IAC-Caiapó apresentando os menores índices de severidade. A produção foi maior nas parcelas tratadas com o inseticida, nos dois locais, tendo o IACCaiapó apresentado produções superiores aos demais cultivares. A ação do thiamethoxam controlando o tripes e reduzindo a severidade da verrugose deve ser melhor explorada nas práticas de manejo integrado.Palavras-chave adicionais: Sphaceloma arachidis, Enneothrips flavens, inseticida. ABSTRACT Effect of thiamethoxam application to thrips control on the reduction of peanut scab severityThe relation among the application of thiamethoxam for thrips control and the severity of peanut scab was evaluated in field experiments runned at Campinas and Pindorama, during 2001/2002, in split-plot design. Main plots consisted of the control and no control of thrips with thiamethoxam and, subplots, of six peanut cultivars: IAC-Tatu-ST, IAC-5, IAC-22 (upright type, short cycle), Runner IAC-886, Tegua and IAC-Caiapo (runner type, long cycle). The evaluations of number of thrips per leaflet and ratingof symptoms, were performed at 56 and 57 days after sowing date in Campinas and Pindorama, when the highest insect populations where registered. In both experiments a partial control of peanut scab was observed, and so, its severity was evaluated at 79 and 91 days of the plantation, in Campinas and Pindorama, respectively, using a rating scale based on symptons shown in stems and petioles. The results showed the efficiency of thiamethoxam in controling thrips in all cultivars. In both localities was observed a reduction in the severity of peanut scab, when thiamethoxam was applied. The severity of scab was higher in the upright cultivars, with the IAC-Caiapo showing the lower scores of severit...

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Section: Resultsunclassified

Efeito da aplicação de thiamethoxam para o controle do tripes na redução da severidade da verrugose do amendoim

Moraes¹,

Moraes²,

Lourenção³

et al. 2006

Fitopatol. bras.

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“…The change in fungal disease severity could be related to the direct effect of the herbicide in question on the microorganisms themselves, a change in the plant resistance to a given pathogen, or other effects related to the general microflora 1,2,3,4,5,8,10,11,12,13,14,15 The present communication is intended to report the effect of three herbicides extensively used to control weeds on the development of Rhizoctonia disease in cotton.…”

Section: Introductionmentioning

confidence: 99%

Effect of the herbicides trifluralin, dinitramine and fluometuron on rhizoctonia disease in cotton

1979

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SUMMARYThe effect of three different concentrations (half, equal and twice of the recommended dose) of three herbicides (trifluralin, dinitramine and fluometuron) usually used to control cotton weeds on the development of Rhizoctonia disease in cotton was studied. Trifluralin and dinitramine at the lower concentrations increased pre-and/or post-emergence damping off. Both herbicides at these concentrations increased the saprophytic activity of the fungus, while they did not affect the susceptibility of the cotton plants. Fluometuron at the highest concentration used was highly phytotoxic and increased the post-emergence damping off. This chemical at the recommended dose caused a drastic reduction in the pre-and post-emergence damping off caused by R. solani. Flnometuron at this concentration decreased both the susceptibility of the host plants and the saprophytic activity of the fungus.

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“…THE increasing use of herbicides has led to interest in the possible effects of these chemicals on plant diseases, and Richardson (1959) has shown that many insecticides and herbicides can affect the development of diseases. Applications of simazine have resulted in increased severity of Botrytis fabae on broad beans (Grummer, 1963), Ustllago maydis on maize (Yakovleva, 1964) and sugarcane mosiac virus (Adsuar, 1961).…”

mentioning

confidence: 99%

The Effect of Simazine on the Incidence of American Gooseberry Mildew on Black Currants

Upstone¹,

Davies²

1967

Plant Pathology

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Effect of Insecticides and Herbicides Applied to Soil on the Development of Plant Diseases: Ii. Early Blight and Fusarium Wilt of Tomato

Cited by 32 publications

References 2 publications

Efeito da aplicação de thiamethoxam para o controle do tripes na redução da severidade da verrugose do amendoim

Efeito da aplicação de thiamethoxam para o controle do tripes na redução da severidade da verrugose do amendoim

Effect of the herbicides trifluralin, dinitramine and fluometuron on rhizoctonia disease in cotton

The Effect of Simazine on the Incidence of American Gooseberry Mildew on Black Currants

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