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vol.38 número1Monitoramento da suscetibilidade a inseticidas em populações de Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) no BrasilAnálise faunística de Anastrepha spp. (Diptera: Tephritidae) em um pomar de goiaba sob manejo orgânico, no município de Una, BA índice de autoresíndice de assuntospesquisa de artigos
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Neotropical Entomology

versão impressa ISSN 1519-566Xversão On-line ISSN 1678-8052

Resumo

VENDRAMIM, José D; SOUZA, Antonio P de  e  ONGARELLI, Maria das G. Oviposition behavior of the silverleaf whitefly Bemisia tabaci biotype B on tomato. Neotrop. entomol. [online]. 2009, vol.38, n.1, pp.126-132. ISSN 1678-8052.  http://dx.doi.org/10.1590/S1519-566X2009000100014.

The objective of this work was to evaluate the influence of the leaf surface, the insect geotropic behavior and the type of foliar trichome on Bemisia tabaci (Genn.) biotype B oviposition on tomato leaves. Bemisia tabaci females were confined in acrylic boxes in which tomato leaflets were fixed at the bottom and top part of the boxes to allow insects to access the leaf surface to be tested (adaxial and/or abaxial) in both no-choice and free choice tests. Oviposition was always higher when the leaf was offered at the top of the box and preferably at the abaxial leaf surface. The effects of leaf trichomes (glandular and non glandular) on B. tabaci oviposition was evaluated by offering the abaxial surface of tomato leaflets to females after a 70% ethanol wash to remove glandular exsudates against a control treatment (without a ethanol wash). Oviposition was concentrated mostly near to non glandular trichomes, showing whitefly females can discriminate among the trichomes.

Palavras-chave : Host selection; oviposition preference; glandular trichome; trichome exsudate.

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