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为明确朱砂叶螨抗炔螨品系的相对适合度,在朱砂叶螨敏感品系(SS)的基础上使用炔螨特持续筛选34代获得了炔螨特抗性品系(PRR34)。通过统计2个品系的实验种群生命表,对其发育历期、繁殖力及种群参数差异进行了比较。结果表明,朱砂叶螨敏感品系经炔螨特持续筛选34代后(PPR34),其抗性倍数为37.78。与SS品系相比,PPR34卵孵化率、发育历期和世代周期均无显著差异,但产卵前期显著延长了37.07%,单雌产卵量减少14.61%,雌雄性(♀/♂)比增加了23.38%。采用Weibull分布拟合存活曲线模型为DeeveyⅠ型,SS品系和PRR34品系的参数c值分别为2.04和2.38。其种群趋势指数、内禀增长率(rm)、净生殖率(R0)分别为123.78、0.24和25.34,以及111.91、0.26和28.99;PRR34品系的相对适合度为1.14,与敏感品系相比存在一定优势。因此,与敏感品系相比,朱砂叶螨抗炔螨特品系单雌产卵量下降,但雌性比增加,种群适合度优势较高,可能导致抗性种群迅速增长并增加防控难度。
In order to determine the relative fitness of tetranychus verrucosa-resistant strains, the propargite-resistant strain (PRR34) was obtained by continuous selection of propargite mite for 34 generations on the basis of the SSR susceptible strain (SS). By comparing the life table of experimental population of two strains, the difference of developmental period, fecundity and population parameters were compared. The results showed that the susceptible strain of Tetranychus cinnabarinus was continuously screened for 34 generations (PPR34) with propargite mite, with a resistance multiple of 37.78. Compared with the SS strain, there was no significant difference in the hatching rate, developmental period and generational cycle of PPR34 eggs, but the pre-oviposition period was significantly prolonged by 37.07%, the number of ovipositional fecundity by 14.61% and the ratio of male and female (♀ / ♂) 23.38%. The survival curve model fitted by Weibull distribution was Deevey type Ⅰ, the c values of SS strain and PRR34 strain were 2.04 and 2.38, respectively. The population trend index, intrinsic rate of increase (rm) and net reproductive rate (R0) were 123.78, 0.24 and 25.34, respectively, and 111.91, 0.26 and 28.99 respectively. The relative fitness of PRR34 was 1.14, Advantage. Therefore, compared with the susceptible lines, the anti-Propargite sp. Mites had a decreased fecundity per females, but higher females’ ration and superiority of population fitness could lead to rapid population growth and increased control difficulty.