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草地贪夜蛾(FAW)草地贪夜蛾是一种主要的迁徙和多噬性害虫。FAW的越冬、迁徙和定植性状与植被和寄主适应性密切相关。在这项研究中,我们调查了春夏作物(玉米)和两种冬季作物(卷心菜,芸苔属和油菜,油菜,油菜)的产卵偏好,喂养偏好,适应性和耐寒性。结果表明,FAW可以通过喂食卷心菜和油菜来完成其生命周期,尽管健康状况不如玉米。以卷心菜为食的FAW存活率、雌蛹质量和宿主适宜性指数高于油菜,幼虫更喜欢以油菜叶为食,雌性更喜欢在油菜植株上产卵。此外,与玉米和油菜相比,以卷心菜为食的FAW幼虫从寒晕中恢复的时间最短,表明以卷心菜为食可提高FAW幼虫的耐寒性。因此,卷心菜可能是FAW的理想宿主,需要在冬季生存和繁殖。研究结果提高了我们对FAW寄主选择和适应的理解,为预测FAW冬季繁殖区奠定了基础。
Spodoptera frugiperda, Brassica plants, host selectivity, life cycle, fitness, cold tolerance
Spodoptera frugiperda, Brassica plants, host selectivity, life cycle, fitness, cold tolerance
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