本文用“Y”形嗅觉仪 (定向选择法 ) ,观测了棉蚜对不同植物材料、花椒 (ZanthoxylumbungeanumMaxum .)的不同部位、不同重量的花椒嫩梢及机械损伤后不同时间的花椒嫩梢的定向和选择行为。结果表明寄主植物的气味对棉蚜有明显的引诱作用 ,而非寄主植物的气味对棉蚜无明显的引诱作用 ,甚至有排斥作用 ;而同一寄主植物的不同部位对棉蚜的引诱作用明显不同 ,甚至有的部位有排斥作用 ,而且气味源的重量对棉蚜也有一定的影响 ;棉蚜对寄主机械损伤的反应随时间的增长而减弱 In this paper, “Y” shape olfactometer (directed selection method) was used to observe the orientation of the young aphid on the different parts of Zanthoxylumbungeanum Maximum, the different weight of peppercorns and the young peppercorns at different time after mechanical injury And choose behavior. The results showed that the odors of the host plants had obvious attraction to the cotton aphid, while the odor of the non-host plants had no obvious attraction or even repellency to the cotton aphid; however, the attraction of different parts of the same host plant to the cotton aphid was obviously different , And even some parts of the role of repellent, and the odor of the weight of the aphid also have a certain impact; host aphid host mechanical damage response weakened over time