disserves

Apple Alternaria Bloth is one of the most important diseases that disserves leaves and fruits, its occurrence has been tending to rise for recent years in east of Gansu apple product area.

摘要苹果斑点落叶病在陇东苹果产区发病近年有上升趋势，是危害苹果叶和果实的主要病害之一。