【摘要】 榆叶斑蛾是榆树的专食性害虫,在陕西每年发生1代,以蛹越冬。老熟幼虫危害性很大,在局部地区经常暴发成灾。用20％杀灭菊酯乳油6000倍液或40％氧化乐果乳油1200倍液喷雾防治,均可取得98％以上的杀虫效果。更多还原

【Abstract】 Describes a specific insect pest Illibers ulmivora Graeser of Ulmus Pumila L. It has one generation year and overwinters as pupas. The amature la-vare are extreme harmful and usually bring serious disasters in some areas It can be controlled by spraying with 6000 times diluent of 20% fenvalera-te or 1200 times’ diluent of 40% omethoate.In either case the in secticidal effectiveness was above 98%.更多还原