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What are the control methods for the pear bicolor aphid pest?
This insect, commonly known as the pear aphid, is a major pest of pear trees and is found in all pear-growing regions. After pear trees are infested, large numbers of leaves curl up, causing early defoliation, weakening of tree vigor, and impaired fruit development, seriously affecting yield and quality. [Occurrence pattern] About 10 or more generations occur per year. Overwintering eggs generally hatch in March and late March when pear buds swell and open. After the young aphids grow, they continuously give live birth to new young aphids. By late April, winged aphids begin to appear. During May, winged aphids form in large numbers and migrate to weeds to reproduce and cause damage. In October, winged aphids migrate back to pear trees