科研之友
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摘要
The present study is the first to investigate resistance levels of Tetranychus cinnabarinus (Boiduval) in mulberry in southwest China. The toxicity and resistance of seven common acaricides, including dichlorvos, phoxim, methomyl, pyridaben, propargite, abamectin and chlorfenapyr, were assayed for seven mulberry field strains of mites along with a laboratory susceptible strain (SS). The results indicated that most field strains exhibited low to moderate levels of resistance. Mengzi and Xiangyun had moderate resistance to phoxim (RR=31.45 and 26.22, respectively). The Qiaojia, Luliang, Mengzi and Heqing strains showed moderate resistance to chlorfenapyr (RR=14.98-22.52). Correlation analysis of resistance ratio in seven acaricides indicated that methomyl and abamectin were negatively correlated. The results provide information for acaricide rotations and resistance management of spider mite in mulberry plantations.
