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What are the pest control methods for the pear lace bug?

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This insect, also known as the army-matching bug, gathers as adults and nymphs on the undersides of leaves to pierce and suck sap, causing the damaged leaves to be densely covered with small white spots, or even to turn entirely pale, leading to early defoliation, affecting tree development and flower bud formation, and in severe cases causing the tree to bloom twice in the same autumn, damaging the following year's yield. This insect has a relatively mixed diet and can harm many fruit trees such as pear, apple, Chinese pearleaf crabapple, crabapple, peach, cherry, hawthorn, and jujube. [Occurrence pattern] It has 4-5 generations per year. Overwintering adults begin activity and lay eggs in mid-April, with an egg period of 10-15 days. The

This insect, also known as the army-matching bug, gathers as adults and nymphs on the undersides of leaves to pierce and suck sap, causing the damaged leaves to be densely covered with small white spots, or even to turn entirely pale, leading to early defoliation, affecting tree development and flower bud formation, and in severe cases causing the tree to bloom twice in the same autumn, damaging the following year's yield. This insect has a relatively mixed diet and can harm many fruit trees such as pear, apple, Chinese pearleaf crabapple, crabapple, peach, cherry, hawthorn, and jujube.

[Occurrence pattern] It has 4-5 generations per year. Overwintering adults begin activity and lay eggs in mid-April, with an egg period of 10-15 days. First-generation nymphs appear successively in early May, with peak occurrence in mid-May. Nymphs of subsequent generations appear in mid-to-late June, early-to-mid August, and early-to-mid September, and from mid-to-late October adults migrate and overwinter. This insect has a relatively high number of generations, the hosts of each generation are complex, and overlapping generations in the field are severe. Prolonged dry weather favors the reproduction and damage of this insect.

[Control methods] (1) In winter, thoroughly sweep up dead branches and fallen leaves in the orchard and weeds at the edges, and burn them in a centralized manner to eliminate overwintering adults. (2) Grasp the pest situation and control it early and completely. ① Vigorously carry out control of the overwintering generation: in late March or early April, before overwintering adults become active, carry out soil disinfection, which has a significant effect on eliminating overwintering adults. ② Spray pesticide in a timely manner at the initial stage of nymph occurrence for each generation, especially to control the early occurrence stage of third- and fourth-generation nymphs. Pesticides can be 80% dichlorvos emulsion at 800-1000 times dilution, or 50% fenthion emulsion at 1000 times dilution, or 20% fenvalerate emulsion at 2000 times dilution, preferably sprayed 2-3 times consecutively. When spraying, pay attention to encircling and wiping out the pests, avoid missing sprays, and act simultaneously to prevent migration and flight.

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