Competition between Cicadella viridis (L.) and Empoasca biguttula Shiraki was the strongest;competition between Tetranychus cinnabarinus (Boisduval) and Empoasca biguttula Shiraki was weak.

• 大青叶蝉与棉叶蝉的竞争作用强，朱砂叶螨与棉叶蝉的竞争作用弱；