Environmental Entomology (2004) 33, 310-319

Natalia Botero-Garcés and Rufus Isaacs (2004)
Influence of uncultivated habitats and native host plants on cluster infestation by grape berry moth, Endopiza viteana Clemens (Lepidoptera: Tortricidae), in Michigan vineyards
Environmental Entomology 33 (2), 310-319
Abstract: Vitis grapevines are the native host of the grape berry moth, Endopiza viteana Clemens (Lepidoptera: Tortricidae), and are found in uncultivated habitats throughout eastern North America. Levels of infestation by grape berry moth larvae at vineyard borders and interiors were compared among vineyards adjacent to four types of uncultivated habitats: deciduous woods, coniferous woods, a single row of trees, and grasses. Adult male moths were monitored at these same positions and inside uncultivated habitats using sex pheromone-baited traps. Wild grapevines were surveyed at each site for their presence or absence, abundance, and whether they bore fruit. Infestation of grape clusters at vineyard borders was greater when adjacent to deciduous woods than grasses, but infestation near grasses was not significantly different from infestation near coniferous woods. Captures of moths inside vineyards were similar irrespective of nearby uncultivated habitat type. In uncultivated habitats, significantly fewer moths were trapped in grasses than in habitats with trees. Depending on habitat type, wild grapevines were found in 71-100% of the adjacent habitat sites, and although vine presence did not vary with habitat type, the proportion fruiting was significantly greater in deciduous woods than the other habitats. Significant, but weak positive correlations were found between larval infestation in vineyards and the abundance of wild grapevines and occurrence of fruit in adjacent uncultivated habitats. Results indicate that the presence of wild hosts within adjacent habitats and their likelihood of fruiting are important determinants of risk from grape berry moth infestation in a vineyard. The implications of these findings for cultural approaches to management of grape berry moth are discussed.
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Database assignments for author(s): Rufus Isaacs

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Paralobesia viteana	Grapevine (Vitis)	U.S.A. (NE)