The Eucalyptus production has suffered great losses from the attack of a new pest, the Thaumastocoris peregrinus, popularly known as bronze bug to cause silvering on eucalyptus leaves. This symptom occurs because of your eating habits, because it sucks the sap of its host. This feeding causes direct damage to trees, because its leaves stay with tanned look, reducing photosynthesis, reaching dry and fall off, which can lead to the death of the plant. There are few studies relating to this pest, with no effective control. With intuited to know about the digestive morphology and the interaction of this with micro-organisms, targeting subsidies to the control of this pest were performed histology of the digestive system and sequencing of DNA fragments obtained from internal micro-organisms to the insect. The histology allowed to observe that the bronze bug does not have the gastric cecum of the midgut that stores micro-organism to assist in digestion of food, and their digestive system is divided into three parts, foregut, middle and posterior, which is possessor of a pair of salivary glands that are composed of two lobes each. Molecular analysis enabled us to verify that, possibly, there are micro-organisms present in the digestive system living in association with the same.

A produ??o de eucalipto vem sofrendo grandes preju?zos com o ataque de uma nova praga, o Thaumastocoris peregrinus, seu nome popular ? percevejo bronzeado devido seu h?bito alimentar, succivoro. Essa alimenta??o causa danos diretos ?s ?rvores, deixando as folhas com aspecto bronzeado, diminuindo a fotoss?ntese, chegando a secar e cair, o que pode culminar com a morte da planta. Poucos s?o os estudos relacionados a essa praga, n?o existindo um controle eficaz. Com o intuito de conhecer sobre a morfologia do sistema digest?rio, bem como a intera??o deste com micro-organismos e visando fornecer informa??es ao controle dessa praga, foram realizadas a histologia do sistema digest?rio e sequenciamento de fragmentos de DNA obtidos de micro-organismos internos ao inseto. A histologia permitiu observar que o percevejo n?o tem os cecos g?stricos, parte do intestino m?dio que armazena micro-organismos que auxiliam na digest?o dos alimentos e que ? possuidor de um par de gl?ndulas salivares que s?o compostas de dois l?bulos cada. As an?lises moleculares possibilitaram verificar que, possivelmente, existem micro-organismos presentes no sistema digest?rio vivendo em associa??o com o mesmo.

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Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016.

Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)

Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais (FAPEMIG)

APERAM BioEnergia

VERACEL