02090naa a2200253 a 450000100080000000500110000800800410001910000180006024500980007826000090017650001260018552012830031165000150159465000120160965000090162165300090163065300190163965300130165865300180167165300180168970000190170770000210172677300890174711155702018-08-20       2005    bl uuuu     u00u1 u    #d1 aARRUDA, I. C.  aFeeding and arrestment responses of Diabrotica speciosa to cucurbitacin-content formulations.  c2005  aTítulo em português: Respostas alimentares e arrestantes de Diabrotica speciosa a formulações contendo cucurbitacina.  aThe objective of this work was to evaluate arrestant and stimulant feeding effects on Diabrotica speciosa (Ger.), using cucurbitacin-content starch-based formulations prepared with varying starch sources, and adding potassium lignate. In a glass slide assay, the wash off resistance of formulations was compared. Potassium lignate did not improve wash off resistance. Lagenaria vulgaris L. powder, in which cucurbitacin B concentration was determined as 0.28%, was added to the most adhesive formulation. The resultant material was used in a two-choice assay in which leaves of common bean, Phaseolus vulgaris L., treated with concentrations of 2.5%, 5%, 10%, 15% and 20% were offered to insects together with untreated control leaves. Greater number of insects and leaves consumed were found on leaves treated with cucurbitacin-content formulation (2.5%, 5% - greatest response -, 10% and 15% concentrations) than on untreated control leaves. The concentration, in which responses were higher, was sprayed in a bean field at 1,000, 1,900 and 3,000 g ha-1. Greater number of beetles was found in plots treated with the highest dosage, 3 and 6 days after spraying. Ten days after spraying, no significant differences were found among dosages, probably due to washoff of the bait.  aColeoptera  aInsecta  aIsca  abait  alarva alfinete  arootworm  asemiochemical  asemioquímico1 aVENTURA, M. U.1 aSCARMINIO, I. S.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 40, n. 7, p. 639-643, jul. 2005