CRUZ, I.

PETACCI, F.

SERRÃO, J. E.

SILVA, R. B. da

TAVARES, W. de S.

ZANUNCIO, J. C.

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SELECTIVITY OF BOTANICAL EXTRACTS OF THE CERRADO ON TENEBRIO MOLITOR (COLEOPTERA: TENEBRIONIDAE) AND ANTICARSIA GEMMATALIS (LEPIDOPTERA: NOCTUIDAE)Autores:Wagner de Souza Tavares (Rua Afonso Pena, prédio 04 apartamento 204 Centro Viçosa/MG 36570000 wagnermaias@yahoo.com.br Universidade Federal de Viçosa) , José Cola Zanuncio (Universidade Federal de Viçosa) , Rafael Braga da Silva (Universidade Federal de São Carlos) , Fernando Petacci (Universidade Federal de Goiás) , Ivan Cruz (Embrapa Milho e Sorgo) , José Eduardo Serrão (Universidade Federal de Viçosa) Tenebrio molitor L. (Coleoptera: Tenebrionidae) and Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) are agricultural pests and alternative hosts of parasitoids. The use of botanical insecticides is an alternative for the pest control. This work aimed to evaluate the effect of plant extracts from cerrado in the reproductive capacity of T. molitor and A. gemmatalis. The extracts were evaluated at concentrations of 0.1 or 0.01% (w.w-1) in the laboratory of the Federal University of Viçosa in Viçosa, Minas Gerais State, Brazil. The ethanol extracts used were obtained from Bidens sulphurea (flowers) and Vernonia aurea (leaves) (Asteraceae), Salvertia convallariaedora (leaves) (Vochysiaceae), Acisanthera sp. (leaves) (Melastomataceae), Memora nodosa (leaves and flowers) (Bignoniaceae), and the flavonoid astilbin, isolated from Dimorphandra mollis (flowers) (Leguminosae). The control had only water or ethanol. The experimental design was entirely randomized, with 36 treatments and 10 replications, each one with one pupa of T. molitor or one piece of paper with 10 eggs of A. gemmatalis. The mortality of two-d-old pupae of T. molitor and one-d-old eggs of A. gemmatalis was higher than one-d-old pupae and two-d-old eggs, respectively. Treatments at concentration of 0.1% showed higher toxicity on these insects than treatments with 0.01%. The viability and duration of the stages of T. molitor and A. gemmatalis were also affected by the extracts. The most activities extracts were B. sulphurae and S. convallariaedora. Males of T. molitor and A. gemmatalis were heavier than females. Deformations were common in insects treated with the extracts. The extracts affected the second generation of T. molitor and A. gemmatalis, although these insects showed better development than in the first one. Extracts from B. sulphurae and S. convallariedora can be recommended for programs of Integrated Pest Management (IPM).

Selectivity of botanical extracts of the cerrado on Tenebrio molitor (Coleoptera: tenebrionidae) and Anticarsia gemmatalis (Lepidoptera: noctuidae).

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