《环境昆虫学报》

作者	单位
周晓静，黄未末，李超，刘娟，廖江花	新疆农业大学农学院，农林有害生物监测与安全防控重点实验室，新疆乌鲁木齐 830052

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中文摘要:

为明确野生寄主植物对马铃薯甲虫种群繁殖及生长发育方面的影响，本试验比较了天仙子、刺萼龙葵2种野生寄主对马铃薯甲虫产卵量、孵化率、发育历期以及种群生命参数的影响。结果表明：取食不同寄主植物的马铃薯甲虫产卵量和孵化率均有显著差异(P＜0.05)，卵期无显著差异(P＞0.05)，取食天仙子的雌虫产卵量显著低于取食马铃薯和刺萼龙葵雌虫产卵量；对1龄幼虫的存活率有显著性差异(P＜0.05)，取食天仙子的雌虫的下一代1龄幼虫存活率显著低于其他寄主植物1龄幼虫；取食不同寄主植物的下一代马铃薯甲虫种群净增值率(R0)、内禀增长率(rm)、周限增长率(λ)都有显著差异(P＜0.05)，世代平均周期(T)无显著性差异(P>0.05)；取食天仙子的马铃薯甲虫下一代种群净增值率(R0)、内禀增长率(rm)、周限增长率(λ)显著小于取食马铃薯、刺萼龙葵的下一代种群。由此可知，天仙子作为马铃薯甲虫野生过渡寄主植物，对马铃薯甲虫种群繁殖策略的作用弱于马铃薯和刺萼龙葵。在马铃薯甲虫前沿分布区，应进一步加强对刺萼龙葵野生寄主的铲除，防止马铃薯甲虫种群进一步扩散，保障马铃薯产业健康发展和粮食安全。

英文摘要:

In order to find out the effect of wild host plants on the population reproduction and growth of Colorado potato beetle, a cultivation host of Solanum tuberosum Linn, Hyoscyamus niger Linn and Solanum rostratum Dunal were determined by the test with two kinds of wild hosts, which affect the fecundity, hatching rate, survival rate, reproduction and life table parameters of Colorado potato beetle population. The results showed that：There were significant differences on the fecundity and hatching rate among different host plants feeding of the previous generation Colorado potato beetles. The spawning rate of females feeding on Hyoscyamus niger Linn was significantly lower than that of females feeding on Solanum tuberosum Linn and Solanum rostratum Dunal; there was a significant difference in the survival rate of 1st instar larvae (P <0.05). The survival rate of the next-generation 1st instar larvae of worms was significantly lower than that of other host plants. The next-generation Colorado potato beetles feeding on different host plants had significant differences (P<0.05) in Net reproductive rate (R0), Innate capacity of increase (rm), and Finite rate of increase (λ) , and there was no significant difference in the Mean generation time (T) of generations (P> 0.05). The Finite rate of increase (λ) was significantly smaller than that of the next generation of Solanum tuberosum Linn and Solanum rostratum Dunal. It could be seen from this that Hyoscyamus niger Linn, as a wild transitional host plant of Colorado potato beetles, had a weaker effect on the breeding strategy of Colorado potato beetles than Solanum tuberosum Linn and Solanum rostratum Dunal. In the frontal distribution area of Colorado potato beetles, the eradication of wild hosts of Solanum rostratum Dunal should be further strengthened to prevent further spread of Colorado potato beetle populations and to ensure the healthy development of the Solanum tuberosum Linn industry and food security.

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