Characterization of the grape pest complex in Oklahoma occurred in a two year field study. Three major pests were suspected to cause the most significant amount of economic damage; the grape berry moth, Endopiza viteana Clemens, grape root borer, Vitacea polistiformis (Harris), and different species of leafhoppers (Family: Cicadellidae). Monitoring and characterization began March 1 and ended August 15. Four different sites were chosen for monitoring in Oklahoma; Payne County (Perkins), Oklahoma County (Luther), Wagoner County (Stone Bluff), and Craig County (Big Cabin). Regular (bi-weekly and tri-weekly) counts were recorded for grape berry moth and grape root borer. The primary leafhopper species captured consisted of the potato leafhopper, Empoasca fabae (Harris). Weekly monitoring and scouting resulted in the discovery of stinkbugs as a major pest species. The developmental model for the grape berry moth was evaluated to determine the accuracy of model prediction. Accumulation of degree-days, beginning at different dates (January 1, February 1, March 1, and a bio-fix), were compared and contrasted to determine the greatest correlation of degree-day accumulation to life stage development of the grape berry moth.
Species 1: Lepidoptera Tortricidae Endopiza viteana (grape berry moth)
Species 2: Lepidoptera Sesiidae Vitacea polistiformis (grape root borer)
Species 3: Homoptera Cicadellidae Homalodisca coagulata (glassy-winged sharpshooter)
Keywords: grapes, phenology
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