Predispersal infestation of Vochysia haenkeana seeds by Lius Conicus/Infestacao pre-dispersao de sementes de Vochysia haenkeana por Lius conicus

The deficient development of fertile seeds of native forest plant species in Brazil limits the reproduction of these plants in various conditions. Among the limiting biotic factors in quality and quantity of the forest seeds, borer insects are quite prominent, before and after their dispersion. This...

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Bibliographic Details
Published in:Ciência rural 2017-09, Vol.47 (9)
Main Authors: Lourenco, Samara Leticia Oliveira, Luiz, Marcelo Felix, de Jesus, Flavio Goncalves, Carvalho, Daniel Diego Costa, Hornburg, Michael, Araujo, Marcio da Silva
Format: Article
Language:Spanish
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Summary:The deficient development of fertile seeds of native forest plant species in Brazil limits the reproduction of these plants in various conditions. Among the limiting biotic factors in quality and quantity of the forest seeds, borer insects are quite prominent, before and after their dispersion. This study reports for the first time a host of the buprestid beetle Lius conicus (Gory & Laporte, 1840). The larval development of L. conicus takes place in the seed capsules of Vochysia haenkeana Mart. (Vochysiaceae), a typical tree species in the Brazilian cerrado biome. In two regions of the cerrado in Goias State, Brazil, almost ripe fruits of V. haenkeana were collected directly from the plants. After natural drying, and fruit and seed processing in laboratory, damage caused by the L. conicus larvae was quantified and qualified. Bigger fruits were preferred as hosts. Fruits developing on the eastern side of the plant were most frequently occupied by L. conicus. Seed lots of bigger fruits showed damage up to 37.5% from the infestation by L. conicus larvae. There was only one larva per fruit, which damaged all the seeds of the capsule (three or four) and generally consumed around 26% of the seed dry mass. Key words: Brazilian cerrado, "pau-amarelo", seed damage, insect. O deficiente desenvolvimento de sementes ferteis de especies florestais nativas no Brasil limita a propagacao dessas plantas em diversas condicoes. Entre os fatores bioticos limitantes da qualidade e quantidade das sementes florestais, destacam-se os insetos broqueadores, antes e depois da sua dispersao. Este estudo relata pela primeira vez um hospedeiro do besouro buprestideo Lius conicus (Gory & Laporte, 1840). O desenvolvimento larval de L. conicus ocorre em capsulas com sementes de Vochysia haenkeana Mart. (Vochysiaceae), uma tipica arvore do bioma cerrado brasileiro. Em duas regioes do cerrado, no Estado de Goias, no Brasil, frutos quase maduros de V haenkeana foram coletados diretamente das plantas. Apos secagem natural e benefleiamento de frutos e sementes em laboratorio, os danos causados pelas larvas de L. conicus foram quantificados e qualificados. Frutos maiores foram os preferidas como hospedeiros desse inseto. Os frutos produzidos pela planta, voltados para ponto o cardeal leste, foram os mais infestados por L. conicus. Lotes de sementes provenientes de frutos maiores apresentaram infestacao porL. conicus de ate 37,5%. Observou-se que houve apenas uma larva desse inseto por fruto, qu
ISSN:0103-8478
1678-4596
DOI:10.1590/0103-8478cr2016Q953