大双尾天社蛾Cerura erminea menciana Moore又叫柳(杨)二尾天社蛾,杨二尾舟蛾,属于鳞翅目天社蛾科。因本科幼虫大多颜色鲜艳,背部常有显著的峰突,臀足不发达或特化成为可向外翻缩的枝形尾角,栖息时一般只靠腹足固着,头尾翘起,形如龙舟,所以改为舟蛾科,此虫又称为杨二尾舟蛾。一、分布及为害树种:在我国内地许多省、市、自治区都有分布;我区拉萨、山南、日喀则,昌都等地区很多县也有分布。主要为害柳树和杨树,在我所靠近柳树的苹果树上,也发现有极少数大双尾天社蛾的幼虫取食苹果树叶子,并在苹果树上作茧化蛹越冬。 Cervidae Minama menciana Moore, also known as Liu (Yang) two days of moths, Yang Erwei dock moths, belonging to Lepidoptera days Moth family. Due to the majority of undergraduate larvae bright colors, the back often significant prominent sudden protrusion, buttocks, underdevelopment or specialization can be turned out to the outside of the branch-shaped tail angle, habitat, usually only by the gas and stomach fixation, head and tail tilt, shaped like Dragon Boat, so replaced by moth family, this worm, also known as Yang Erwei boat moth. First, the distribution and damage Tree species: Many provinces, municipalities and autonomous regions in mainland China have distribution; my area Lhasa, Shannan, Shigatse, Qamdo and many other counties are also distributed. The main damage willows and poplars, in my apple tree near the willow, but also found that there are a very small number of large two-tailed moth larvae feeding apple tree leaves, and cocoon pupation in the apple tree overwintering.