蚱蝉又叫知了 ,是多种林木和果树的害虫 ,在安徽省怀宁县是杜仲的主要虫害。以成虫产卵刺破枝条皮层及木质部 ,使产卵的枝条很快萎蔫枯死 ,以２ -５年生杜仲幼林受害重 ,枝条枯死率可达４０ %以上。若虫在土中刺吸根系营养 ,影响树势 ,严重时受害树可整株枯死。防治方法如下 :? Grasshoppers, also known as caterpillar, are pests of many trees and fruit trees and are the major insect pests of Eucommia in Huaining County, Anhui Province. To adult eggs pierce the branches cortex and xylem, the spawning branches quickly wilted dead, 2-5 year-old Euonymusia sinensis young victims, dead shoots up to 40% or more. Nymphs in the soil thorn suck root nutrition, affecting the tree potential, severe damage to the whole tree withered trees. Prevention methods are as follows:?