noun
: a phase of rugose mosaic developing soon after infection and characterized by necrotic streaks on the stem and underside of the veins of some of the leaves and by falling of the leaves from the lowest upward
noun
: a phase of rugose mosaic developing soon after infection and characterized by necrotic streaks on the stem and underside of the veins of some of the leaves and by falling of the leaves from the lowest upward
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012