二十二、舟形毛虫舟形毛虫又名苹果天社蛾、黑纹天社蛾,是果树秋季的主要害虫之一。此虫幼虫食害苹果、梨、杏、李、海棠、榆叶梅和山楂等多种果树的叶片,为害严重时食尽全叶,仅剩部分叶柄。成虫体长25毫米左右,触角丝状,体黄白色。前翅白色至黄白色,翅上有4条不明显的黄褐色波状横纹。近翅基有一个银灰色和紫褐色各半的椭圆形斑纹,靠外缘有同色斑纹6个。后翅只有一条黑褐色横带。卵球 Twenty-two, the boat-shaped caterpillar The boat-shaped caterpillar, also known as the apple-day moths, black moths, is one of the major pests in the fall of fruit trees. This worm larvae eat apple, pear, apricot, plum, begonia, elm leaf and hawthorn and other fruit trees leaves, when serious damage to make full leaves, leaving only part of the petiole. Adults about 25 mm body length, antennae filiform, body yellow-white. Wings white to yellow-white, wings on the 4 obvious yellowish wavy stripes. Near the wing base has a silver gray and purple brown half of the oval markings, by the outer edge of the same color markings 6. Hind wings only a dark brown band. Ovoid