1993年7月至9月份,丹凤县的峦庄、铁峪铺、竹林关等乡镇境内栎粉舟蛾大发生,来势凶猛,蔓延迅速。害虫所到之处,成片栎叶一扫而光,危害状似火烧一般,其猖獗之势十分罕见。虫口密度多则250头/平方米,少则19头/平方米,平均危害蔓延速度0.75公里/天,受害总面积18万余亩,被害株率达100％,直接经济损失达540万余元。 丹凤县委、政府成立了栎粉舟蛾防治领导小组,由主管县长任组长,以林业部门为龙 July 1993 to September, Danfeng County Luan Zhuang, Tieyuku, such as the town of bamboo forest Quercus moth large occurrence, ferocious, rapid spread. Pests everywhere, into a piece of oak leaves swept away, endangering like a fire in general, its rampant trend is very rare. Insect population density as many as 250 head / square meter, at least 19 head / square meter, the average spread of harmful speed 0.75 km / day, the total area of ​​180,000 acres of victims, the victim plant rate of 100%, the direct economic loss of 540 million yuan . Danfeng County, the government set up a leading group of oyster moth prevention and control, headed by the competent county head, the forestry sector as a dragon