There is a small hole in the leaves of the jujube tree.
Consultation: There are small holes in the leaves of the jujube tree, and some are shrunken. It seems that insects have eaten, but no insects have been found. What is the problem?
Answer: There are two possibilities for the appearance of similar symptoms. One is Guo Gongjia (insect pests). The insects are very small, and they may dive in the daytime, and exercise in the evening or at night. If you can carefully see the small beetles, the wings are basically red, with symmetrical black vegetable spots. The second is a kind of bacterial disease. The new leaves are often deformed. The holes in the leaves are also small and have yellow spots. According to the cause of targeted spraying, insecticide usable streptomycin pyrethroids. It can also be applied in two mixtures.
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