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抗药性监测结果表明，三年来贵阳小菜蛾种群对杀虫及的抗性增长２３．５倍；其余各地种群仍有较高的敏感性；对敌敌畏各地种群仍有较高的敏感性，抗性不明显；对溴氰菊酯贵阳、安顺种群产生了高度抗性，与敏感品系比较抗性分别增长１１２４倍和５５８倍，其余各地种群对溴氰菊６８仍有较高的敏感性，抗性不明显。交互抗性测定结果表明：抗杀虫双品系对同类药剂杀螟丹有明显的正交互抗性；对敌敌畏、溴氰菊酯、灭多威和苏云金杆菌等的敏感度较高。田间防治试验结果表明，杀虫双仍有较高的防治效果，苏云金杆菌和螨虫素与杀虫双混用可明显提高防治效果。
Resistance monitoring results showed that the population of Plutella xylostella in Guiyang had 23.5 times more resistance to insecticides and insecticides during the past three years; the rest of the population remained highly sensitive; the sensitivity to the dichlorvos population was still high Was not obvious. It was highly resistant to deltamethrin in Guiyang and Anshun populations, and increased by 1124 times and 558 times respectively compared with susceptible strains. The rest of the populations were still highly susceptible to deltamethrin 68, and resistance Not obvious. The result of cross resistance test showed that the anti-insecticidal double-line had obvious orthogonal cross-resistance to the same drug cartap and the sensitivity to dichlorvos, deltamethrin, methomyl and thuringie bacillus. Field control test results show that there is still a high control effect of insecticidal double, Bacillus thuringiensis and mites and insecticide double mixed can significantly improve the control effect.