榆兰金花虫(又称榆兰叶(虫甲),Galerucella aellescens Fairm.)是我国北方地区主要林木害虫,据林业部1981年统计,仅华北地区就有60万亩榆树片林和6.2亿多株四旁树受到榆兰金花虫危害。我市自1980年以来平均每年约有23万多亩榆树受害,树叶被吃成网孔,树冠枯黄,给林业生产造成很大威协,是我市林业病虫害的主要防治对象。 According to the statistics of the Ministry of Forestry in 1981, only 600,000 mu of elm tree forest and 620 million trees were found in North China alone. Many strains of trees by the endangered elm gold pest. The city has suffered an average of about 230,000 mu of elm trees each year since 1980. The leaves are eaten into meshes and the canopy is yellow. This has caused a great threat to forestry production and is the main control target of forestry pests and diseases in our city.