House flies had evoluted high resistance to DDVP in Yizheng and Yangzhong.In Yizheng, house flies had evoluted highest resistance to deltamethrin, while in Yangzhong the resistance is low.

• 仪征、扬中地区家蝇对敌敌畏产生高抗，仪征地区家蝇对溴氰菊酯最高抗，扬中地区则为低抗。