Abstract
The mymarid wasp, Anagrus epos Girault, an egg parasite of the grape leafhopper, Erythroneura elegantula Osborn, also parasitized eggs of the prune leafhopper, Edwardsiana prunicola (Edwards), inhabiting French prune trees. Studies showed that the prune leafhopper completed four generations during the year. Anagrus overwintered within the prune leafhopper eggs laid in prune twigs. In early spring, emergence of the Anagrus adults coincided with the egg laying period of the grape leafhopper in nearby vineyards. Movement of Anagrus from prune orchards to the vineyards was determined with sticky traps used to catch Anagrus adults and examinations for parasitized grape leafhopper eggs on grape leaves collected at various distances away from the orchards. Results showed that Anagrus generated in prune orchards can migrate to vineyards and be effective in controlling the grape leafhopper.
- Received January 1984.
- Copyright 1984 by the American Society for Enology and Viticulture
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