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【目的】小菜蛾Plutella xylostella(L.)是全球十字花科植物上最重要的害虫。由于施药成本的增加以及对环境的破坏性危害,抗性栽培种成为控制小菜蛾的理想选择。本研究中,鉴于对花椰菜不同栽培种的抗感性缺乏充分的了解,我们评价了几个常见栽培种的抗性以及不同植物栽培种对害虫种群增长潜力的影响。【方法】在25±2℃,RH 65%±5%和光周期16L∶8D的室内条件下,研究了小菜蛾P.xylostella在5种花椰菜栽培种(Smilla,White cloud,Buris,Galiblanka和Tokita)上的生命表参数。【结果】不小菜蛾幼期发育历期变化范围从Smilla上的13.44d至Buris上的15.88 d。在Buris上观察到最高的生殖力。在Smilla上饲养的小菜蛾种群内禀增长率(0.27±0.02)和有限增长率(1.32±0.13)最高,而倍增时间最短(2.50 d)。【结论】因此,与其他栽培种相比,在伊朗南部Smilla更适合小菜蛾存活和繁殖,在条件合适和天敌缺乏时该害虫的种群能快速增长。
【OBJECTIVE】 Plutella xylostella (L.) is the most important pest on cruciferous plants in the world. Resistant cultivars are ideal for controlling Plutella xylostella due to increased application costs and the devastating impact on the environment. In this study, given the lack of adequate understanding of the anti-susceptibility of different cultivars of cauliflower, we evaluated the resistance of several common cultivars and the effects of different plant cultivars on the pest population growth potential. 【Method】 Five cabbage cultivars (Smilla, White cloud, Buris, Galiblanka and Tokita) were used to study the effects of P.xylostella On the life table parameters. 【Result】 The results showed that the developmental period of non-diamondback moth did not change from 13.44 days on Smilla to 15.88 days on Buris. The highest fecundity was observed on Buris. The intrinsic rate of increase (0.27 ± 0.02) and the limited rate of increase (1.32 ± 0.13) of the diamondback moth population on Smilla were the highest, while the doubling time was the shortest (2.50 d). 【Conclusion】 Therefore, Smilla is more suitable for the survival and reproduction of Plutella xylostella in southern Iran than other cultivars, and the population of the pest can grow rapidly when the conditions are right and the natural enemies are lacking.