水杉尺蠖（学名待定）在大丰县首次发生是在１９９２年９月下旬，当年危害面积达几十公顷，发生严重之处，林木整株叶片被吃光，整片林子如火烧一般。第２年即１９９３年４月２０日左右，在水杉林中开始出现刚羽化的成虫，虫口基数大，密度相当高，通过采取切实可行的防治措施? Metasequoia 蠖 蠖 (scientific name to be determined) first occurred in Dafeng County in late September 1992, when the damage area of ​​dozens of hectares, a serious place, the whole plant leaves were eaten, the whole piece of wood such as fire in general. In the second year, around April 20, 1993, newly emerged adult worms began to emerge in the forests of Metasequoia glyptostroboides, with a large population of insect population and a very high density. By adopting practical prevention and control measures,