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Impacts of Standard Wine-Making Process on the Survival of Lobesia botrana Larvae (Lepidoptera: Tortricidae) in Infested Grape Clusters

Varela, L. G., Lucchi, A., Bagnoli, B., Nicolini, G., Ioriatti, C.
Journal of economic entomology 2013 v.106 no.6 pp. 2349-2353
Lobesia botrana, Vitis vinifera, larvae, pressing, risk, wastes, wine grapes, winemaking, California
To determine the risk winery waste poses for the spread of Lobesia botrana (Denis & Schiffermüller) (Lepidoptera: Tortricidae) in California, we evaluated the survival of larvae in artificially infested grape clusters (Vitis vinifera L.) processed for wine making. The trial consisted of five treatments: whole cluster pressing to 1 bar (100,000 Pa); whole cluster pressing to 2 bars (200,000 Pa); destemming and berry pressing to 1 bar; destemming and berry pressing to 2 bars; and control. Each treatment was replicated with the following five winegrape varieties: Chardonnay, Sauvignon Blanc, Gewürztraminer, Yellow Muscat, and Cabernet Sauvignon. All winery waste was inspected for larval survival. No live larvae were recovered from any of the treatments in all five varieties; therefore, the hypothesis that green winery waste contributes to the spread of L. botrana was rejected.