Managing Resistance Evolution in Two Pests to Two Toxins with Refugia
用监管模型分析美国中南部两种害虫对Bt棉和拟除虫菊酯的抗性演化，评估不同避难所种植要求的经济效果，发现减少避难所要求可提高利润，喷洒避难所比未喷洒更划算。
We use a regulatory model with resistance evolution in two pests to insecticidal Bt cotton and pyrethroids (a conventional insecticide) to examine non-Bt cotton (refuge) planting requirements designed to manage Bt-resistance evolution in the midsouth. Our analysis suggests that reduced refuge requirements would enhance producer profitability, sprayed refugia are more cost effective than unsprayed refugia, and producers would receive slightly higher returns under dynamic relative to static refuge policies. Pyrethroid susceptibility in one of the pests was a renewable resource, and toxin-mixture effects associated with pyrethroid use in Bt cotton were important considerations for midsouth refuge policies. Copyright 2004, Oxford University Press.