One of the major pests on apples, the codling moth, is found in all areas where apples are grown. It attacks pears, apricots and quinces as well as apples. Small holes are found on the fruit, usually at or near the blossom end. Inside, pinkish-white worms with brown heads feed on the flesh, leaving tunnels full of sawdustlike frass (droppings). The feeding of larva inside the developing fruit often causes fruits to drop prematurely.
The codling moth larvae overwinter in cocoons under loose bark on the trunk or under debris on the ground. In midspring they pupate, emerging as grayish-brown moths in late spring. The females lay eggs on leaves, twigs and fruits. The larvae feed briefly on the leaves before tunneling into the fruits. After feeding for three to five weeks, they emerge and crawl down the trunk in search of a spot to pupate. There may be up to three generations per year.
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