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MIKAMI, Adriana Yatie and VENTURA, Maurício Ursi. Cucurbitacin (Lagenaria vulgaris L.) starch bait improves efficiency of carbaril insecticide in the Diabrotica speciosa, in laboratory. Cienc. Rural [online]. 2008, vol.38, n.8, pp. 2119-2123. ISSN 0103-8478. http://dx.doi.org/10.1590/S0103-84782008000800005.
Diabrotica speciosa (Germar, 1824) (Coleoptera: Chrysomelidae: Galerucinae) is an important polyphagous pest in Latin America. The control is made using synthetic insecticides, which cause environmental problems. Then, objective this work was to study the cucurbitacin (Lagenaria vulgaris L.) starch based associated with carbaril insecticide for D. speciosa control, in the laboratory. Multiple-choice and no-choice tests with adult insects were realized. The treatments were: cucurbitacin starch based bait, cucurbitacin starch based bait plus carbaril insecticide, insecticide carbaril alone and control (distillated water). Corn plants were sprayed with insecticide solutions in greenhouse and leaves were removed. Leaves were offered to insects and seven evaluations (three, five, seven, ten, 12, 14 and 17 days after applied) were achieved. Feeding leaf area and mortality were evaluated. Cucurbitacin starch based bait elicited phagostimulant effect on adults of D. speciosa. Addition of cucurbitacin starch based bait on carbaril insecticide increased insecticide efficiency.
Keywords : Luperini tribe; corn rootworm; Zea mays; semiochemic; alternative control.