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Ciência Florestal
Centro de Pesquisas Florestais - CEPEF, Departamento de Ciências Florestais - DCFL, Programa de Pós Graduação em Engenharia Florestal - PPGEF
ISSN: 0103-9954
EISSN: 0103-9954
Vol. 19, No. 2, 2009, pp. 183-193
Bioline Code: cf09018
Full paper language: Portuguese
Document type: Research Article
Document available free of charge

Ciência Florestal, Vol. 19, No. 2, 2009, pp. 183-193

 pt Avaliação do potencial de uso do hiperparasita Dicyma pulvinata check for this species in other resources (Berk. & M. A. Curtis) no controle biológico do mal-das-folhas [ Microcyclus ulei check for this species in other resources (Henn.) Arx] de seringueira [ Hevea brasiliensis check for this species in other resources (Wild. ex A. Juss.) Muell. Arg.] em São José do Rio Claro, MT
Delmadi, Leila Cristiane; Neto, Daniel Cassetari & Rocha, Vander de Freitas

Resumo

Mato Grosso foi o estado brasileiro de maior extensão em cultivo de seringueira ( Hevea brasiliensis check for this species in other resources ), com 45.727 ha de monocultivo em 2002. A ocorrência do "Mal-das-Folhas" causado pelo fungo [ Microcyclus ulei check for this species in other resources (Mycosphaerellaceae, Dothideomycetidae), considerado como a principal doença da seringueira, é um fator limitante à instalação de novos empreendimentos. Uma opção promissora, o controle biológico, poderá permitir o equacionamento desse problema fitossanitário. No presente trabalho, buscou-se avaliar o potencial de uso do hiperparasita Dicyma pulvinata check for this species in other resources (fungo anamorfo) no controle de Microcyclus ulei, em comparação ao controle químico. Foram conduzidos experimentos em campo e em casa de vegetação no município de São José do Rio Claro, MT. Foram realizadas aplicações em três concentrações diferentes de Dicyma pulvinata além dos princípios ativos Benomyl e Mancozeb. Em campo, as maiores porcentagens de controle foram obtidas com a pulverização de Benomyl e de 8,1 x 106 e 1,215 x 107 conídios/ml de Dicyma pulvinata. Em casa de vegetação, os melhores resultados foram obtidos com as pulverizações de 2,025 x 107 e 3,037 x 107 conídios/ml.

Palavras-chave
Hevea; mal-das-folhas; controle biológico; controle químico.

 
 en Evaluation of the potential use of the hyperparasite Dicyma pulvinata check for this species in other resources (Berk. & M. A. Curtis) in the biological control of rubber tree [ Hevea brasiliensis check for this species in other resources (Wild. ex A. Juss.) Muell. Arg.] south american leaf blight [ Microcyclus ulei check for this species in other resources (Henn) Arx] in São José do Rio Claro, MT
Delmadi, Leila Cristiane; Neto, Daniel Cassetari & Rocha, Vander de Freitas

Abstract

Mato Grosso was the Brazilian state with the largest extension in rubber tree ( Hevea brasiliensis check for this species in other resources ) plantation, with 45,727 hectares of monoculture in 2002. The occurrence of the "South American Leaf Blight" caused by Microcyclus ulei check for this species in other resources (Mycosphaerellaceae, Dothideomycetidae), considered the main disease of the rubber tree, is a limiting factor to the implantation of new enterprises. A promising option, the biological control, could permit the solution of this phytosanitary problem. The objective of this work was to evaluate the potential of hyperparasite Dicyma pulvinata check for this species in other resources (anamorph) on Microcyclus ulei control in comparison with the chemical control. Experiments were conducted in the field and in a greenhouse in the district of San José do Rio Claro (MT). Applications in 3 different concentrations of Dicyma pulvinata besides the active ingredients Benomyl and Mancozeb were done. In the field, the major control percentages were obtained with the pulverization of Benomyl and of 8,1 x 106 or 1,215 x 107 conidia/ml of Dicyma pulvinata. In the greenhouse, the best results were obtained with the pulverization of 2,025 x 107 or 3,037 x 107 conidia/ml.

Keywords
Hevea; South American Leaf Blight; biological control; chemical control

 
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