Agrilozodes suarezi (Coleoptera: Buprestidae) as secondary colonizer of a Sclerolobium sp. branch girdled by Oncideres saga (Coleoptera: Cerambycidae)
Keywords:
Buprestidae, host tree, Rio Doce State Park, twig girdler beetlesAbstract
A large number of invertebrates use dead wood as shelter, food, and as a microclimate refuge. Ecological succession in this substrate depends on primary colonization, stimulating or inhibiting future successions. Twig girdler beetles girdle and lay eggs inside the bark of branches and trunks of different host plants. Branch girdling blocks the phloem flow, making it more nutritive for offspring and future colonizers. This study, in the State Park of Rio Doce (PERD), Minas Gerais, Brazil, is the first report of a secondary colonization by borers on a Sclerolobium sp. branch girdled by Oncideres saga (Coleoptera: Cerambycidae). A Sclerolobium sp. branch, girdled by O. saga was collected in Rio Doce State Park, cut into pieces, and brought to the laboratory, where it was stored in a cardboard box and moistened monthly. A total of 28 adult beetles of 4 species emerged from this branch. Agrilozodes suarezi was found for the first time developing inside a branch of its first host plant. The life history of insects of the genus Agrilozodes is poorly known, because this is the first report of aspects of its biology.
Sumário
Um grande número de invertebrados utiliza madeira morta como abrigo, alimento e refúgio microclimático. A sucessão ecológica neste substrato depende da colonização primária, estimulando ou inibindo futuras colonizações. Besouros serradores roletam e ovipositam no interior da casca de galhos e troncos de diferentes plantas hospedeiras. O roletamento do galho obstrui o fluxo do floema, tornando o local mais nutritivo para sua prole e futuros colonizadores. Este estudo foi o primeiro relato de colonização secundária de broqueadores em um galho de Sclerolobium sp. anelado pelo serrador Oncideres saga (Coleoptera: Cerambycidae) no Parque Estadual do Rio Doce (PERD), em Minas Gerais, Brasil. Um ramo de Sclerolobium sp., roletado por O. saga foi coletado no Parque Estadual do Rio Doce, seccionado em partes e levado ao laboratório, onde foi mantido em caixa de papelão e umedecido mensalmente. Um total de 28 besouros adultos de 4 espécies emergiram deste galho. Agrilozodes suarezi foi encontrado pela primeira vez se desenvolvendo no interior de um galho de sua primeira planta hospedeira. A história de vida de insetos do gênero Agrilozodes é pouco conhecida, sendo este o primeiro relato de aspectos de sua biologia.
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