Abstract
Intensive sampling of commercial Concord grape vineyards in North East, Erie Co., PA, during 1971–73 revealed the presence of 45 species of Hemiptera-Heteroptera. Eleven families were represented with the largest number of species occurring in the Miridae (14), Lygaeidae (12), Pentatomidae (5), and Nabidae (4). Abundant species collected were, in descending order of abundance, Orius insidiosus (Say), Geocoris bullatus (Say), Lygus lineolaris (P. de B.), Nabis spp., Trigonotylus sp., Nysius spp., and Ligyrocoris diffusus (Uhler). The majority of the species collected were considered merely transients; those species that may feed on grapes or are predators of insects and mites are discussed in more detail and population trends presented. Sprays of carbaryl at recommended rates appeared to have little effect on populations of Nabis, Orius , and Geocoris . Species diversity was greater in the abandoned vineyard than in the commercial vineyards.
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