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      AVALIAÇÃO DO POTENCIAL DE USO DO HIPERPARASITA Dicyma pulvinata (Berk. & M. A. Curtis) NO CONTROLE BIOLÓGICO DO MAL-DAS-FOLHAS [Microcyclus ulei (Henn.) Arx] DE SERINGUEIRA [Hevea brasiliensis (Wild. ex A. Juss.) Muell. Arg.] EM SÃO JOSÉ DO RIO CLARO, MT Translated title: EVALUATION OF THE POTENTIAL USE OF THE HYPERPARASITE Dicyma pulvinata (Berk. & M. A. Curtis) IN THE BIOLOGICAL CONTROL OF RUBBER TREE [Hevea brasiliensis (Wild. ex A. Juss.) Muell. Arg.] SOUTH AMERICAN LEAF BLIGHT [Microcyclus ulei (Henn) Arx] IN SÃO JOSÉ DO RIO CLARO, MT

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          Abstract

          RESUMO Mato Grosso foi o estado brasileiro de maior extensão em cultivo de seringueira (Hevea brasiliensis), com 45.727 ha de monocultivo em 2002. A ocorrência do “Mal-das-Folhas” causado pelo fungo Microcyclus ulei (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 (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.

          Translated abstract

          ABSTRACT Mato Grosso was the Brazilian state with the largest extension in rubber tree (Hevea brasiliensis) plantation, with 45,727 hectares of monoculture in 2002. The occurrence of the "South American Leaf Blight" caused by Microcyclus ulei (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 (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.

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          Most cited references 19

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          Instituto Brasileiro de Geografia e Estatística

          (2020)
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            Controle biológico de doenças de plantas

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              Doenças da Seringueira no Brasil

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                cflo
                Ciência Florestal
                Ciênc. Florest.
                Universidade Federal de Santa Maria (Santa Maria, RS, Brazil )
                0103-9954
                1980-5098
                June 2009
                : 19
                : 2
                : 183-193
                Affiliations
                Cuiabá Mato Grosso orgnameUniversidade Federal de Mato Grosso Brazil casetari@ 123456terra.com.br
                Alta Floresta Mato Grosso orgnamePrefeitura Municipal de Alta Floresta Brazil vander@ 123456unemat.br
                Cáceres Mato Grosso orgnameUniversidade do Estado de Mato Grosso Brazil leila.delmadi@ 123456unemat.br
                S1980-50982009000200183
                10.5902/19805098409

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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                Figures: 0, Tables: 0, Equations: 0, References: 20, Pages: 11
                Product
                Product Information: SciELO Brazil

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