怎样防治梨象鼻虫梨象鼻虫简称梨象虫，俗称梨狗子、梨虎，是梨树上发生普遍且为害较重的一种害虫。发生严重时使梨树大年变小年，小年无收成。梨象虫除为害梨果外，还为害山楂、桃等。以成虫和幼虫在树下６－１０厘米深土层中越冬，梨树开花时有少量成虫出土，５月下旬至... How to prevent pear weevil Pear weevil Pear weevil, commonly known as pear dog, pear tiger, pear is common and harmful to a pest. In case of serious pear tree year change small, no annual harvest. Pest insects as pear damage in addition to pear fruit, but also hawthorn, peach and so on. To adults and larvae in the trees 6-10 cm deep in the winter, pears flowering a small amount of adult unearthed in late May to ...