Lethality of reduced-risk insecticides against plum curculio (Coleoptera: Curculionidae) in blueberries, with emphasis on their curative activity.

摘要: BACKGROUND: Historically, management of plum curculio, Conotrachelus nenuphar (Herbst), in highbush blueberries has focused on post-bloom broad-spectrum insecticide applications targeting the adults. Here, efficacy different classes insecticides against various stages C. was compared, and a prebloom treatment with chitin synthesis inhibitor novaluron combination application tested. RESULTS: Novaluron decreased number oviposition scars eggs fruit reduced larval emergence by >60% when applied prebloom. Post-bloom oxadiazine indoxacarb organophosphate phosmet, but not neonicotinoid acetamiprid, showed significant adulticidal activity. The neonicotinoids acetamiprid thiamethoxam phosmet curative activity larvae topically to infested fruit, whereas pyrethroid fenpropathrin, were weaker agents. Residue profiles that residues had highest levels while fenpropathrin lowest penetration. CONCLUSIONS: In blueberries, anti-ovipositional/ovicidal activity, best (larvicidal) control .A an adulticidal/larvicidal is recommended for optimal multi-life-stage C.nenuphar. c � 2013 Society Chemical Industry