It usually takes more than 20 generations a year to overwinter with eggs on peach trees. It can also be used as a wingless raw female for wintering in windbreaks or vegetables in crates with cruciferous vegetables. When the eggs were used for wintering on the peach trees, the peach buds germinated till the flowering stage in the early spring of the following year. The eggs began to hatch and the clusters sucked on the shoots. Between March and April, breeding is done in an isolated manner. Adults and larvae clustered on the back of the leaves, and the victim's leaves moved from the leaf margin to the dorsal aspect of the leaf. The tissue became hypertrophic, chlorotic, and excreted mucilage to contaminate the foliage, inhibiting shoot growth and causing defoliation.
Control methods: (1) Remove litter in winter, scrape off rough old bark, cut off damaged shoots, and burn them centrally. (2) Protect the natural enemies of locusts, such as grasshoppers and ladybugs, and spray them as little or as little as possible. (3) Chemical control: In the early spring, when the peach buds sprout, the overwintering eggs hatching period is the key period for controlling peach aphid. At this time, pyrethrins (3,000 times) are used as pyrethroid pesticides or nitrate heterocyclic pesticides. 3% acetamiprid spray 2500-3000 times a "dry branch", can basically control the hazard. During the hazard period, the insect should be sprayed before the number of insect populations is large. It is possible to use 3000-4000 times of 10% imidacloprid and 2000 times of 48% of Le Siben EC. The dry water in the mountainous area can be dried with methamidophos. This method saves labor and energy. Water, not injuring natural enemies, can be used during the germination period and the damage period. First, gently scrape the old rough skin (do not hurt the bark), then fold the absorbent toilet paper 4-6 layers, so that the length and breadth are equal to the circumference and dry diameter, and then the folded toilet paper is full of 50% methamidophos Emulsion 2-4 times. Wrap it with plastic film on the trunk. Due to the high concentration of the drug, rubber gloves should be worn during the operation. Wash hands with soap after work to prevent poisoning.
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