Parlatoria zizyphus harms plants such as citrus, jujube and coconut. The larvae and adults cluster on the leaves and fruit to cause harm and, when severe, affect the quality and appearance of the fruit. ?? Morphological characteristics? Female adults: shell black, about 1.8 mm. Near rectangular, with 2 longitudinal ridges on the back. Gray and white wax patches are attached around the shell and at the trailing edge. The body is obovate, pale purple. The male shell was similar to the female, but smaller and narrow, about 1 mm long, pale yellow, the first peeling black, attached to the front, the remainder was gray wax. Male adults: body purple, wing 1 pair, translucent, abdomen with needle-like copulator.

Life habits? 3-4 generations a year, the wintering of eggs under the female shell. Overlapping generations are extremely irregular. In late April, the newly hatched cubs began to migrate to the same year when they moved to the spring spot. In the late May, there were a few migration hazards to the fruit; in June-August, a large number of hazards occurred on the leaves and fruits; Increasingly; in mid-August, it was transferred to the leaves of summer shoots for harm. Each female adult can hatch more than 50 heads. After the newly hatched nymphs leave the mother, they migrate to the leaves and damage the fruit, and less occur on the shoots. Through seedlings and wind power, wind power is its main medium of communication. Dark and weak vegetation grows in the dark garden, which is beneficial to its fertility.

?? Prevention methods
1. From the end of April to the beginning of May or from the late July to the beginning of August, control once every 15 days and prevent and treat 2-3 times in a row. Refer to the arrowhead tip prevention and control method for the prevention and treatment of pharmaceuticals and their concentration.
2, cut pests in winter, increase fertilizer management.

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