The disease often occurs in places with high humidity and no ventilation. In early spring, the new leaves and buds are easy to be infected with the pathogen. A thin layer of white powder appears in the affected parts, and then yellow or black particles grow on the white powder layer, and the leaves turn yellow and dry and die in the later stage. You can spray it with water.
The disease occurs from March to May. The pathogen mainly damages the buds and leaves of plum blossom, causing the leaves to shrink and the surface of the leaves to become rough. When it is serious in the later stage, the growth of trees will become weak and the flowers will be reduced. You can spray a little tobuzine or carbendazim every other week, about 3-4 times after the cure.
In the leaves and branches of plum blossom, there are brown round spots on the leaves at the beginning, and then the spots expand to gray or gray white. In the later stage, the middle part of the spots is easy to be broken, which will make the leaves fall down. At the beginning of the disease, you can spray two kinds of drugs, tobuzin or zineb.
Aphids are more harmful, but sensitive to dichlorvos and other pesticides, so they can be removed by washing powder mixed with water.
