On November 29, 2016, an insect capable of damaging Colorado’s wine grape crop was confirmed in Mesa County. US Department of Agriculture’s Agricultural Research Service entomologists positively identified grapevine phylloxera (Daktulosphaira vitifoliae) on Vitis vinifera grapevines in the Grand Valley American Viticultural Area (AVA), which is a federally designated grape production area in western Colorado. Phylloxera is an aphid-like insect that feeds aggressively on grape roots.

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