Economic Impact of Grapevine Leafroll Disease on Vitis vinifera cv. Cabernet franc in Finger Lakes Vineyards of New York

Supplemental Data

Survey Instrument
To construct economic analysis scenarios, the following survey was conducted among 10 vertically integrated vineyard-winery operations in the Finger Lakes region of New York State from fall 2009 through spring 2010. The wineries selected had vineyards with a history of GLRD infection based on grafted V. vinifera cultivars, including cv. Cabernet franc, showing typical leafroll symptoms or GLRaV-1, GLRaV-2, and/or GLRaV-3 infection as indicated by ELISA and/or RT-PCR (Fuchs et al. 2009b). Respondents provided information about perceived ranges of GLRD prevalence, magnitudes of yield reduction due to the disease, disease control measures adopted by vineyard managers, and penalties incurred due to poor fruit quality.

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