Harmless Control of Flowers and Trees Key Pests of Yinchuan City

The species and the occurrence of the key pests of flowers and trees of Yinchuan City were investigated.There were four types of pests and disease,including leaf-eating pests,boring pests,piercing-sucking pests and underground pests were clarified.The occurrence regularity of pests and disease was also investigated.The paper put forward several non-e vironmental-pollution control methods as biological control,application of pheromone,plant pesticides,bionic pesticides,artificial and mechanical methods and plant quarantine.