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梨大食心虫是梨树的最重要的害虫,一般每年发生2代,以小幼虫在被害的花芽内作茧越冬。第二年3月下旬至4月上旬,从越冬芽内出蛰,由花簇或花簇基部蛀入新芽中,继续危害。严重时,造成花朵或叶丛死亡。这个时期,叫作幼虫“转芽期”.4月底至5月初,小幼虫开始蛀害幼果.一般1个幼虫能蛀害1～3个幼果.6月中、下旬,越冬代成虫大量发生。6月下旬至7月上旬,第一代幼虫孵
Pear borer is the most important pear pests, generally occur 2 generations a year, with small larvae in the victim’s flower buds overwintering. The second year from late March to early April, from the wintering buds sting, from the base of flower clusters or flower clusters into the sprout, continue to harm. Serious, resulting in death of flowers or leaves. This period, known as the larvae “transition period ” from the end of April to early May, the young larvae began to moult the young fruit.Generally one larvae can damage 1 to 3 young fruit.In mid-June, late winter, Adults occur in large numbers. The first generation larvae hatch from late June to early July