Pacific Northwest growers are vigilant following reports of spotted wing drosophila among Concord grapes in eastern Washington and the early appearance of the flies in traps in British Columbia’s Okanagan Valley in Canada. While the susceptibility of wine grapes is not known, table grape and stone fruit ­growers fear the tiny fly could be a devastating new pest for the region. The fly, native to Asia, was originally identified in strawberry fields around Watsonville, California, in August 2008. It was discovered in Pinot Noir grapes in the upper Willamette Valley of Oregon last year as well as in a noncommercial […]