Dynamically optimal strategies for managing the joint resistance of pests to Bt toxin and conventional pesticides in a developing country
研究为何在中国等发展中国家种植非Bt棉花作为庇护所可能不是经济最优的，通过生物经济模型模拟寻找管理害虫联合抗性的最优策略。
In this study we discuss why planting non-Bacillus thuringiensis (non-Bt) cotton as a refuge crop in China (and other developing countries) may not be economically optimal. To show this, we develop a bioeconomic model to run simulations that will help find the optimal strategies for managing the joint resistance of pests to the Bt toxin and conventional pesticides. We show that the approach of not requiring non-Bt cotton as a refuge is defensible given initial conditions and parameters calibrated to China's cotton production environment. Of special importance is the existence of natural refuge crops. The nature of transaction costs associated with implementing a refuge policy is also considered.