Aphelopus albopictus Ashmead (Hymenoptera: Dryinidae): Abundance, Parasitism, and Distribution in Relation to Leafhopper Hosts in Grapes

L. T. Wilson, I. Carmean and D. L. Flaherty

Hilgardia, 1991, vol. 59, issue 1

Abstract: Aphelopus albopictus Ashmead (= A. comesi Fenton), a dryinid nymphal-adult parasite, has been reported as a major mortality agent for grape leafhopper, Erythroneura elegantula Osborn, in the San Joaquin Valley of California. Parasitism levels varied widely among different vineyards. Our studies report up to 33% parasitism of adult grape leafhoppers, with levels considerably less during much of the season.

Keywords: Environmental; Economics; and; Policy (search for similar items in EconPapers)
Date: 1991
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