Insect pests, mainly due to larvae feeding on branches, cause the tree to grow weaker, and in severe cases cause dead branches or dead plants. Therefore, combining winter pruning to eliminate its overwintering parasites and controlling the occurrence of pests in the coming year is an effective way to reduce losses. The control method is:

There are three kinds of Tianniu species: Sang Tianniu, Xingtianni, and Bianhongshangou. 2-3 years old generation, endangering the xylem and pith, the affected area normal skin, there is a row of fecal holes at a certain distance, the worm tract is relatively straight, red-brown worm excretion accumulated on the ground, a little 80% DDVP with cotton balls Or 0.2 grams of aluminum phosphide made into the penultimate or second row of fecal holes, and all the fecal holes sealed with wet mud. Aluminum phosphide is very toxic and is safe to use.

Giardiasis parasitizes in apples and pear trees and occurs one to two generations a year. It damages the superficial cortex, phloem, and cambium. Cortical areas of the affected area are dehiscent and red mucous is mixed outside the insects. Commonly known as "red oil." The helix spirals upward into an ellipse, and insects are piled with brown worms. Add 1 kg of kerosene and 0.1 kg of 80% dichlorvos emulsifiable concentrate to the insects and kill their larvae.

Pear crest occurs one year after generation. Female adults lay their eggs in the phloem of young shoots in mid- and mid-April and then use their jagged ovipositors to saw the upper part of the ovipositor. The larvae hatch and eat. Directly reach biennial branches and settle them for winter. When cutting in winter, cut the broken piles, pay attention to cut to the branches of the three-year-old, concentrated burning.

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