NATURAL ENEMIES OF CRANBERRY FRUITWORM, ACROBASIS-VACCINII, (LEPIDOPTERA, PYRALIDAE) IN MICHIGAN HIGHBUSH BLUEBERRIES

A two-year study was conducted in Michigan highbush blueberries to det ermine the complex of parasitoids attacking cranberry fruitworm, Acrob asis vaccinii. Eight parasitoid species and one fungal pathogen were c ollected. Parasitism of collected hosts ranged from 6.6% to 28.1%. The more common larval parasitoid encountered was Campoletis patsuiketoru m (Hymenoptera: Ichneumonidae). The more common parasitoid recovered f rom fruitworm hibernacula was Villa lateralis (Diptera: Bombyliidae). This study documented six unreported natural enemies of cranberry frui tworm, including C. patsuiketorum; V. lateralis; Diadegma compressum ( Hymenoptera: Ichneumonidae); Compsilura concinnata (Diptera: Tachinida e); Memorilla pyste (Diptera: Tachinidae); an undescribed Microtypus s pecies (Hymenoptera: Braconidae); and a fungal pathogen, Paecilonyces near farinosus. This is the first known host association for the undes cribed Microtypus species, and increases the known parasitoid complex of cranberry fruitworm to 17 species.