温度对抗氯氰菊酯和敏感品系淡色库蚊生物学特性的影响

Study on the biological characteristics of Culex pipiens pallens resistance to cypermethrin and susceptibility of the species at different temperatures

目的比较实验室内不同温度下淡色库蚊氯氰菊酯抗性品系和敏感品系的生物学特性变化。方法在17、25和28℃3个不同温度条件下饲养两品系蚊幼虫,观察蚊虫的繁殖、发育及平均寿命等生物学特性。结果淡色库蚊在17℃条件下发育慢,历期长;在28℃条件下发育快,历期短。同一温度下抗性品系蚊卵、幼虫和蛹的发育历期及成虫寿命均低于敏感品系,卵期死亡率高于敏感品系。结论淡色库蚊抗氯氰菊酯品系在不同温度下与敏感品系比较均表现出环境适应能力下降。

Objective To compare the biological characteristics of Culex pipiens pallens resistance to cypermethrin and susceptibility of the species at different temperatures in the laboratory.Methods The growth,reproduction,and life expectancy of two mosquito populations were observed under laboratory conditions at different temperatures（17 ℃,25 ℃,and 28 ℃）.Results Culex pipiens pallens had a longer life span at 17 ℃ than at 28 ℃.At the same temperature,adult mosquitoes that were resistant to cypermethrin had a shorter lifespan and quicker development of eggs,larvae,and pupae than did mosquitoes that were susceptible to cypermethrin;differences between resistant and susceptible populations were significant.Mosquito larvae that were susceptible to cypermethrin had a higher mortality rate;differences between resistant and susceptible populations were significant.Conclusion Culex pipiens pallens resistance to cypermethrin results in diminished ability to adapt to environments with different temperatures.