The continuous spread of the invasive Western Corn Rootworm (WCR; Diabrotica virgifera virgifera) poses a threat to maize production regions. We develop a spatially explicit integrated modelling framework to analyse the performance of cost-effective WCR regulation policies for 2010–2040 at 1 km spatial resolution in Austria. A modelled future baseline WCR abundance is used to design 15 alternative WCR regulation policies differing in regional delineation, risk propensity, and maize restriction levels. We calculate cost-effectiveness ratios to rank the overall performance of alternative WCR regulation policies considering three climate scenarios and two policy implementation levels. The model results show that with the best performing WCR regulation policy, reducing 1 ha high WCR abundance area comes with a decrease in total net returns of 112 €, assuming optimal cropland use under similar climate conditions. Moreover, marginal opportunity costs of policy compliance (costs for switching to the second-best alternative) vary spatially, by policy configuration, and among climate scenarios. According to the results, wetter climate conditions lead to higher and drier climate conditions to lower marginal opportunity costs compared to climate conditions similar to the past. The analysis provides a sound basis for cost-effective policy design and implementation to regulate WCR infestation.

侵入性西部玉米根虫 (WCR ; Diabrotica virgifera virgifera)的持续传播) 对玉米产区构成威胁。我们开发了一个空间明确的综合建模框架，以分析奥地利 1 公里空间分辨率下 2010-2040 年具有成本效益的 WCR 监管政策的表现。建模的未来基线 WCR 丰度用于设计 15 种替代 WCR 监管政策，这些政策在区域划分、风险倾向和玉米限制水平方面有所不同。我们计算成本效益比，以在考虑三种气候情景和两种政策实施水平的情况下对替代 WCR 监管政策的整体绩效进行排名。模型结果表明，假设在相似气候条件下最佳农田利用，在执行最佳 WCR 监管政策的情况下，减少 1 公顷高 WCR 丰度面积会导致总净收益减少 112 欧元。而且，政策遵守的边际机会成本（转向次优替代方案的成本）在空间、政策配置和气候情景之间存在差异。根据结果​​，与过去类似的气候条件相比，更潮湿的气候条件导致更高和更干燥的气候条件，从而降低边际机会成本。该分析为具有成本效益的政策设计和实施以规范 WCR 侵扰提供了良好的基础。