数字农科院2.0

Beyond climate matching: Optimizing selection of Trichogramma parasitoids against the invasive tomato leafminer Tuta absoluta in China

文献类型： 外文期刊

作者： Xue, Yantao;Wang, Weifeng;Lu, Yanhui;Huang, Cong;Xian, Xiaoqing;Zhang, Guifen;Liu, Wanxue;Wan, Fanghao;Wu, Suran;Zhang, Yibo

作者机构：

关键词： Tuta absoluta;Trichogramma;Biological control;Species distribution model;Pest kill rate

期刊名称： ECOLOGICAL FRONTIERS

ISSN：

年卷期： 2025 年 46 卷 1 期

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收录情况： ESCI（2025版）

摘要： Selecting effective biological control agents (BCAs) is critical for managing invasive pests such as the tomato leafminer, Tuta absoluta, a species that has posed a significant agricultural threat in China since its recent invasion. Traditional selection methods prioritize climate matching but often overlook intrinsic biocontrol efficacy. This study proposes a novel spatially explicit framework that integrates climatic suitability and performance to determine effective BCAs. Using the CLIMEX model, we projected the climatic suitability of T. absoluta and four Trichogramma parasitoids (T. chilonis, T. dendrolimi, T. ostriniae, and T. pretiosum) across China. Crucially, we incorporated the pest kill rate (km) to construct a Comprehensive Index (CI). Spatial projections derived from this parameter revealed a pronounced redistribution of dominant parasitoid species relative to climate-only predictions. T. ostriniae has emerged as the primary dominant agent across China's agricultural zones, including the North China Plain, Yangtze River Basin, Sichuan Basin, and Xinjiang's risk regions, replacing vast areas previously assigned to other parasitoid species under climatematching models. Moreover, T. pretiosum remained dominant in subtropical southern China. This study demonstrated that integrating intrinsic biocontrol efficacy with climatic suitability significantly enhances the robustness of BCA selection, addressing critical limitations of climate-exclusive approaches. Our CI framework provides an evidence-based, spatially optimized strategy for the sustainable management of T. absoluta, prioritizing the targeted deployment of Trichogramma species in key agroecological zones. This methodology can be readily adapted to optimize biocontrol programs against globally invasive pests.

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