Preventive and control measures:

1. Spray 3 ~ 5 Baume lime-sulfur mixture on the trunk in early winter.

2. Spraying 0.5 ~ 1.0 Baume sulfur mixture in the nymph stage, or spraying 40% dimethoate emulsifiable concentrate or 800% 50% malathion at the first hatching of each generation.

3. Pay attention to the protection and utilization of natural enemies, avoid spraying at the peak of fruit setting and natural enemies, and give priority to low-toxic pesticides when spraying.

4. Biological control: Lepidoptera Mongolian moth's chest back plate is black, and there are a pair of red spots on the black COLEOPTERA, and the spots in the front are bigger than those in the back. Prey on scale insects such as persimmon scale and newscale [2]

5. The occurrence of persimmon disease is closely related to persimmon varieties, especially persimmon trees with flourishing leaves, large fruits and thin skin. When building a garden, we should pay attention to selecting excellent insect-resistant varieties that are unfavorable to the growth of persimmon scales, such as square persimmon and Dahongpao persimmon. Improve the stress resistance of persimmon trees in orchard.

Persimmons, insects, HOMOPTERA, mealybugs. It is distributed in most areas of China, endangering persimmons and black dates. Nymphs and female adults suck the sap of leaves, twigs and fruits, causing defoliation, premature fruit drop and even death.