Most winterworms winter in orchards

Most winterworms winter in orchards, and a few migrate from outside orchards to orchards. The wintering generation of adult worms can last until June, when most move out of orchards and lay eggs on other plants, if the worm's generation occurs. Eggs laid before the beginning of June may appear in the first generation of adult worms by August. The first generation of adult insects can lay eggs quickly, and the second generation of adult insects can appear. Eggs laid in early June can only be produced in a generation. The adult worms that appear after mid-August are winter ingenas. The average life expectancy of winter adult worms is 301 days, with a maximum of 349 days. Adult worms that occur in or migrate from the orchard after mid-August, endangering late-stage fruit.