不是高人,在网上看到了这个,共你参考: If the cherry tree's bark appears to be bleeding, the tree may be infected with Phytophthora gummosis. The sap seeps through small cracks in the bark in areas where the bark is darkened by disease. The fungi move by splashing water from heavy rains or overhead irrigation and prefer moist, cool weather . Do not over-water or under-water the tree. Remove the diseased bark plus a margin of healthy bark around it and let the area dry, or burn the diseased bark with a propane torch, along with a 1-inch margin around it. Lightly scrape the bark to find the lesion's margins before using the torch. Apply copper-based or systemic fungicide for control. http://homeguides.sfgate.com/cherry-tree-gummosis-39725.html