Spodoptera frugiperda (JE Smith), or fall armyworm, is one of major migratory agricultural pests with a wide range of hosts. The effect of different hosts (maize and kidney bean) on the growth and reproduction of S. frugiperda were investigated using the age-stage, two-sex life table method. The results showed that S. frugiperda could complete its entire life cycle on both hosts, albeit with significantly different development and reproduction. The durations of larval and pupal development were significantly prolonged whereas adult lifespan was shortened on kidney bean compared to maize. The differences of survival rates at each instar, prepupal and pupal stages between the two hosts were not statistically significant. The total pre-oviposition period was longer on kidney bean than that on maize (42.05 vs 39.04 days), but there was no difference in the oviposition rate (64.77 on kidney bean vs 62.48 on maize). The differences of net reproductive rate, intrinsic rate of increase and finite rate of increase were nonsignificant, while the mean generation time on kidney bean (42.05 days) was significantly longer than that on maize (40.92 days). The results indicate that S. frugiperda can grow and reproduce normally on both hosts, although maize is more suitable. Nonetheless, the data show that this pest is harmful when the population density is high or when the preferred host is scarce.

中文翻译：

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在玉米和芸豆上饲养的草地贪夜蛾（JE Smith）（鳞翅目：夜蛾科）的年龄阶段、两性生命表分析

Spodoptera frugiperda (JE Smith)，或称秋粘虫，是主要的迁徙性农业害虫之一，寄主范围广泛。采用年龄阶段两性生命表法研究了不同寄主（玉米和芸豆）对草地贪夜蛾生长繁殖的影响。结果表明，草地贪夜蛾可以在两种宿主上完成其整个生命周期，尽管发育和繁殖有显着差异。与玉米相比，芸豆的幼虫和蛹发育持续时间显着延长，而成虫寿命则缩短。两种宿主在各龄期、蛹前和蛹期的存活率差异无统计学意义。芸豆的总产卵期比玉米长（42.05 天对 39.04 天），但产卵率没有差异（芸豆为 64.77，玉米为 62.48）。净繁殖率、内在增长率和有限增长率的差异不显着，而芸豆的平均世代时间（42.05天）显着长于玉米（40.92天）。结果表明S. frugiperda 可以在两个宿主上正常生长和繁殖，尽管玉米更适合。尽管如此，数据表明，当种群密度高或首选宿主稀少时，这种害虫是有害的。05 天）明显长于玉米（40.92 天）。结果表明S. frugiperda 可以在两个宿主上正常生长和繁殖，尽管玉米更适合。尽管如此，数据表明，当种群密度高或首选宿主稀少时，这种害虫是有害的。05 天）明显长于玉米（40.92 天）。结果表明S. frugiperda 可以在两个宿主上正常生长和繁殖，尽管玉米更适合。尽管如此，数据表明，当种群密度高或首选宿主稀少时，这种害虫是有害的。