VIRUS MANAGEMENTUNDERSTANDING ECONOMICS OF RED BLOTCH

摘要

An economist and a plant pathologist team up to help growers understand the threshold for action when a vine is diagnosed with the virus.RED BLOTCH is a confounding disease in grapevines. There's the calling card reddening of lower leaves of a vine, fruit that ripens improperly, poor fruit color, and sub-optimal fruit quality with higher acidity and lower Brix, but those could easily be mistaken for stress, nutritional disorders, or even lea-froll. Once a vine has a positive diagnosis, there is no cure for red blotch."Bottom line: whether it is red blotch or another virus in grapes, there is no cure," says Marc Fuchs, Associate Professor in Plant Pathology with Cornell University. "Once a vine is infected with red blotch, it remains infected with red blotch until itdies."