The resistant levels to methamidophos, malathion, isoprocarb and buprofezin were slightly higher in Yunnan and Hainan populations, but the difference was not significant.

• 对甲胺磷、马拉硫磷、叶蝉散和扑虱灵4种药剂的抗性，以云南和海南两种群较高，但差异未达显著水平。