Recently, Ambrostoma quadriimpressum ,maybe the most important pests endangering elm, has brought increasingly serious harm to elm mostly using in landscape greening ,and has a great influence on growth .

• 榆紫叶甲是近年来城市绿化树种榆树的重要害虫之一,并且发生危害日趋严重,已经对榆树生长造成巨大的影响。