Abstract The widespread use of transgenic technologies has led to the emergence of insect populations resistant to Bt toxins. Some lepidopteran pest species also appear to naturally have some level of tolerance to certain proteins, such as some species of Spodoptera to Cry1Ac. One of the main strategies to manage resistance is the use of refuge areas, the success of which is in part dependent on larval movement of the target pest. Thus, in order to assess the viability of a refuge strategy addressing Spodoptera eridania Stoll (Lepidoptera: Noctuidae) in Bt soybean, it was evaluated the larval movement across plants in Bt and non-Bt soybean, as well as the larval development and mortality on Bt and non-Bt soybean cultivars. We concluded that apparent S. eridania incomplete resistance resulting from high larval mortality and low adaptability on Bt plants, high larval dispersal, nondirectional larval movement, and random larval spatial dispersion suggest that structured refuge is more suitable than mixed refuge for managing resistance in S. eridania populations.

中文翻译：

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Bt 和非 Bt 大豆中斜纹夜蛾幼虫的基线植物间幼虫运动及其对 IRM 的可能影响


摘要 转基因技术的广泛使用导致了对 Bt 毒素具有抗性的昆虫种群的出现。一些鳞翅目害虫物种似乎也天然地对某些蛋白质具有一定程度的耐受性，例如某些斜纹翅目物种对 Cry1Ac 的耐受性。管理抗性的主要策略之一是使用避难区，其成功部分取决于目标害虫的幼虫运动。因此，为了评估 Bt 大豆中针对 Spodoptera eridania Stoll（鳞翅目：夜蛾科）的避难策略的可行性，评估了 Bt 和非 Bt 大豆中幼虫在植物间的运动，以及幼虫发育和死亡率。 Bt 和非 Bt 大豆品种。我们得出的结论是，由于幼虫死亡率高、对 Bt 植物的适应性低、幼虫高扩散、幼虫非定向运动和幼虫空间随机分散而导致明显的波江沙蚕不完全抗性，这表明结构化避难所比混合避难所更适合管理波江沙蚕的抗性。埃里达尼亚种群。