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作者就辛硫磷(Phoxim)对氰戊菊酯(Fenvalerate)在抗拟除虫菊酯类杀虫剂的家蝇体内的增效作用进行了初步的研究。结果表明:在辛硫磷与氰戊菊酯同时存在时(质量比为2∶1),家蝇体内未被降解的氰戊菊酯原化合物含量显著高于只使用等剂量氰戊菊酯时的对照处理(2.6—4.6倍)。同时,家蝇对氰戊菊酯的氧化代谢速率降低(17—48%)。这些结果可能是辛硫磷对氰戊菊酯增效的主要作用机制,并对延缓害虫抗药性发展有积极的作用。
The authors conducted a preliminary study of the synergistic effect of phoxim on housefly hosts of fenvalerate against pyrethroid insecticides. The results showed that the contents of fenvalerate compounds not degraded in housefly were significantly higher than those of fenvalerate alone at the same time of phoxim and fenvalerate (mass ratio of 2: 1) Control treatment (2.6-4.6 times). At the same time, housefly reduced the rate of oxidative metabolism of fenvalerate (17-48%). These results may be the main mechanism of synergism of fenphrin by phoxim and have a positive effect on delaying the development of pest resistance.