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采用滤纸药膜法,比较测定磷化氢抗性系数(Rf)分别为295、148、76.5和参考品系(Rf=1)的米象品系对多杀菌素的敏感性,并对比研究了接触多杀菌素后仍然存活的以上诸米象品系害虫的繁殖力的差异。主要结果为:多杀菌素对Rf分别为295、148、76.5和1的磷化氢抗性米象品系的LD50值分别为0.524、0.267、0.182、0.344 mg/cm2,已具有高水平磷化氢抗性和抗性存在显著差异的米象之间对多杀菌素的敏感性差异不明显。经多杀菌素处理后存活的米象繁殖受到抑制,0.496 mg/cm2以上剂量的处理可完全防止米象的后代产生。对磷化氢产生抗性的米象对多杀菌素没有产生交互抗性。
Using the filter paper membrane method, the sensitivity of spinosad to the spinosad line was compared and the resistances of phosphine resistance (Rf) of 295, 148, 76.5 and reference line (Rf = 1) were compared. Differences in fecundity of the above pests were observed after surviving bactericides. The main results were as follows: The LD50 values of spinosad against phosphine resistance rice cultivars with Rf of 295, 148, 76.5 and 1 were 0.524, 0.267, 0.182 and 0.344 mg / cm2, respectively, and had high levels of phosphine There was no significant difference in sensitivity to spinosad between rice plants that had significant differences in resistance and resistance. The survival of the rice after spinosad survival inhibition, 0.496 mg / cm2 above the dose can be completely prevented the generation of rice progeny. Millet resistant to phosphine did not produce cross-resistance to spinosad.