Abstract The infective degree, infective rate, defoliation rate, and shoot maturation degree of different species of grapes were investigated using 54 fresh\|eating grape species as materials.

• 摘要 以54个鲜食葡萄品种为试材，调查统计不同葡萄品种的霜霉病发病程度、发病速率、落叶率和新梢成熟度。