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      Mecanismos de ação de himenópteros parasitóides sobre Megastes spp. (Lepidoptera: Pyralidae) em agroecossistema de batata-doce (Ipomoea batatas L.) Translated title: Attack of parasitoids himenoptera on Megastes spp. (Lepidoptera: Pyralidae) in sweet potato agroecossystem

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          Abstract

          Estudaram-se a presença e a ação de himenópteros parasitóides em agroecossistema de batata-doce (Ipomoea batatas L.) no município de Pedra de Fogo - PB, sobre o complexo Megastes spp, com o objetivo de identificar as espécies de parasitóides existentes, bem como descrever os principais eventos na ação de parasitismo sobre Megastes grandalis Guenee e Megastes pusialis Snellen. No levantamento direto, em 14% das plantas, existiam fêmeas de microhimenópteros ectoparasitóides da família braconidae atacando lagartas de Megastes spp. No levantamento indireto, constatou-se um ataque de parasitóide em 22% das lagartas, emergindo adultos de sete espécies das famílias braconidae, Chalcididae e Ichneumonidae, com predominância de braconídeos ectoparasitóides. Concluiu-se que a presença de parasitóides no agroecossistema da batata-doce é bastante diversificada e proporcionam uma boa contribuição na mortalidade natural da praga.

          Translated abstract

          The presence and action of Hymenoptera parasitoids in agroecossystems of sweet potato (Ipomoea batatas L.) in Pedra de Fogo county - PB, Brazil, on Megastes spp. complex were studied, with the objective of identifying parasitoids species and to describe the main aspects on parasitism action on Megastes grandalis Guenee and Megastes pusialis Snellen. On direct evaluation 14% of plants had females of ectopasitoids belonging to the braconidae family. The indirect evaluation showed the occurrence of 22% of worms attacked by parasitoids. The emergence of parasitoids adults of seven species belonging to the braconidae, Chalcididae and Ichneumonidae families has been observed. It was concluded that the presence of parasitoids in sweet potato agroecossystem is diversified and important to suppress the insect pest.

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          Insect Ecology

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            Bionomics of the Braconidae

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              Genetic improvement of vegetable crops

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                cr
                Ciência Rural
                Cienc. Rural
                Universidade Federal de Santa Maria (Santa Maria )
                1678-4596
                August 2004
                : 34
                : 4
                : 1243-1244
                Affiliations
                [1 ] Universidade Federal da Paraíba Brazil
                [2 ] Conselho Nacional de Desenvolvimento Científico e Tecnológico
                [3 ] Universidade Federal Rural de Pernambuco
                Article
                S0103-84782004000400044
                10.1590/S0103-84782004000400044
                98475bd7-7f8d-4f81-b54a-023f8bdbbb20

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0103-8478&lng=en
                Categories
                AGRONOMY

                Horticulture
                controle biológico,Insecta,biological control,Bracon
                Horticulture
                controle biológico, Insecta, biological control, Bracon

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