舟形毛虫属鳞翅目,舟蛾科。它的食性复杂,主要寄主有:苹果、梨、海棠、桃、李、杏、樱桃、山植、梅、核桃、板栗等。成虫体长约25毫米,翅展约50毫米,体黄白色。卵为球形,直径约1毫米,初产时为淡绿色,近孵化时变为灰色。幼虫1-3龄,头、足为黑色,胴部紫红色,密被白长毛,老熟时体长45-55毫米,全体暗红紫色。静止时,头尾两端翘起似舟状,故称“舟形毛虫”。蛹体长20-25毫米,红褐色。发生规律及习性:各地均一年发生一代,以蛹在树根部约7厘米深的土层内越冬。翌年7-8月上旬羽化,7月中下旬羽化盛期。成虫昼伏夜出,有较强的趋光性,夜间产卵,卵产于树叶背面几十粒单层密集成块,卵期约7天。小幼虫群集在叶面为害,早晚及夜间取食,白天不活动,受振动吐丝下垂,幼虫4—5龄时,分散为害,老熟 Boat caterpillars are Lepidoptera, moth family Branch. Its food complexity, the main host: apple, pear, begonia, peach, plum, apricot, cherry, mountain plant, plum, walnut, chestnut and so on. Adult body length of about 25 mm, about 50 mm wingspan, body yellow-white. Eggs are spherical, about 1 mm in diameter, light green when first born and gray when hatched. Larvae 1-3 age, head, feet black, body purple, dense white hairy, mature body length 45-55 mm, dark red and purple all. Quiet, head and tail tilted like a boat, so called “boat-shaped caterpillar ”. Pupa body length 20-25 mm, red-brown. Occurrence patterns and habits: all over the generation occurs a year, pupae in the roots of about 7 cm deep in the winter soil. The following year, the first ten months of July-August eclosion, mid-late July feather peak. Adults nocturnal, have a strong phototaxis, spawning at night, the eggs produced in the back of the leaves dozens of monolayers dense block, the egg about 7 days. Small larvae cluster damage in the foliage, feeding sooner or later and night, during the day inactive, shedding by vibration silkworm, larvae 4-5 age, disperse damage, mature