桃小食心虫在我场一年发生1—2代,以老熟幼虫做圆形茧在树冠下、堆果场土中越冬。也有小部分未老熟幼虫在果实内越冬。翌年六月中、下旬越冬幼虫开始活动,出土后做长形蛹化茧。六月下旬、七月中旬当年第一代成虫羽化,产卵为害。第一代老熟幼虫大部分不再产生第二代,脱果后即入土做茧越冬。发生第二代的幼 Peach small heart worms occur in our field 1-2 generations a year, with mature cocoon larvae round cocoons under the canopy, the pile of soil overwintering. There are also a few unripe larvae that winter in the fruit. The following year in mid-June, late winter larvae began to move, unearthed to do long pupal cocoon. In late June and mid-July, the first generation of adults emerge and spawn. Most of the first generation of mature larvae no longer produce the second generation, after the fruit into the soil to do the winter cocoon. The second generation of young