Colonization of New York vineyards by Anagrus spp. (Hymenoptera: Mymaridae): overwintering biology, within-vineyard distribution of wasps, and parasitism of grape leafhopper, Erythroneura spp. (Homoptera: Cicadellidae), eggs

摘要: Received February 16, 1999; accepted January 17, 2000 A study was conducted in New York to identify the Anagrus species present vineyards, determine plants which overwinter, and characterize dispersal of wasps level parasitism grape leafhopper eggs vineyards. daanei S. Triapitsyn erythroneurae Trjapitzin Chiappini were most abundant reared from Vitis labrusca Bailey vinifera L. cultivars, respectively. V. cultivars are infested predominantly by Erythroneura comes (Say), whereas primarily vitifex Fitch‐Erythroneura bistrata McAtee complex. tretiakovae seven approximately equal proportions. Thus, A. appear possess greater degrees host specificity than tretiakovae. These results support belief that, although have relatively broad associations, preferences do exist. may be mediated plant associations particular species. use alternate hosts that infest several In particular, diapausing insect Acer saccharum Marshall, Robinia pseudo-acacia L., Rosa multiflora Thunberg, Salix nigra riparia Michaux, Zanthoxylum americanum Miller play important roles overwintering biology Following emergence hosts, adults aggregated at vineyard edge early season (May June). By midseason or later (August September), pattern wasp colonization indicates parasitoids more widely dispersed This is consistent with edges, followed slow into interior. Further investigations necessary host(s) exploits during winter spring delineate phenology such as well leafhoppers spring. Habitat management studies could then strategies would accelerate population growth increase rate © Academic Press