Susceptibility of Grape Cultivars and Selections to Oxidant Injury

Abstract

Oxidant stipple, a manifestation of ozone injury in grapevines, has been shown to occur in the grape growing regions near the Great Lakes (3). Although exact economic losses due to air pollution injury have not yet been assessed for grapes, a wide range of cultivar variation exists with some exhibiting severe foliar injury. Such differences were first reported for some cultivars of Vitis vinifera(2). Certain environmental and cultural factors, i.e., nitrogen status of the vine, rootstock, soil management, soil moisture, also influence the incidence of this disorder (unpublished data).