Effects of fruit ripening and prior larval infestation on feeding and ovipositional preference of adult plum curculio conotrachelus nenuphar (coleoptera: curculionidae)
Reeves, Benjamin Louis
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Plum curculio, Conotrachelus nenuphar (Coleoptera: Curculionidae) fed more on ripe peach compared to non-ripe peach in bioassays, and preference was affected by previous diet. However, additional assays showed that plum curculio laid more eggs in non-ripe peach and non-ripe apple. Behavioral assays also determined that plum curculio visited infested and non-infested apples equally, but fed and laid eggs more in non-infested apples. When assessing plum curculio movement toward peach, trees with a trunk application of TanglefootTM did not have more plum curculio present than control trees, suggesting flight into the canopy. When assessing plum curculio attraction to baited pyramid traps, results suggested that the known attractants benzaldehyde and grandisoic acid may be more efficacious when combined with ripe or non-ripe peaches. Lastly, an insecticidal assay using neonicotinoid clothianidin killed more plum curculio than either microbial based Chromobacterium subsugae strain PRAA4-1 or control treatments.