Downy mildew, a fungal disease native to North America, attacks most species of wild and cultivated grape. The disease was inadvertently introduced into European vineyards in the late 1870’s where it devastated the European ...

Phomopsis cane and leaf spot, once known as “dead arm,” is a common disease in most regions of the world where viticulture is practiced. Severely infected leaves are misshapen, yellow, and fall from the vine prematurely. ...

Eutypa dieback of grapevines, formerly called “dead arm,” was for many years thought to be caused by the fungus Phomopsis viticola. Recently, however, another fungus, Eutypa armeniacae (imperfect stage: Cytosporina), was ...