Seasonal pattern of oviposition by the North American grape berry moth (Lepidoptera: Tortricidae)

摘要: The seasonal patterns of oviposition by the North American grape berry moth, Paralobesia viteana (Clemens) (Lepidoptera: Tortricidae) were monitored in juice (Vitis labrusca) vineyards southwest Michigan. Egg deposition was recorded throughout growing season at two 2006, and four from 2007 to 2009. In each vineyard, a random sample 100 clusters visually inspected twice-weekly number newly laid eggs counted. We found that continuous but variable season. started early June coinciding with bloom, continued low level until mid- late July, intensified August close veraison, ended September often before harvest. There no consistent periods without would indicate distinct generations. To determine contribution moth immigration into vineyard pattern oviposition, six plants located edge next woods covered field cages stocked infested fruit. Oviposition infestation followed weekly on exposed plants. Although higher numbers berries fruit vines than enclosed vines, egg same both treatments. This result indicates is not dependent wild origin. described here contributes difficulty controlling this pest using conventional insecticides short residual activity. J. Appl. Entomol.