Haoxiang Zhao, Xiaoqing Xian, Nianwan Yang, Yongjun Zhang, Hui Liu, Fanghao Wan, Jianyang Guo, Wanxue Liu
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing 100193, China.
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing 100193, China; Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, China.
Sci Total Environ. 2023 Mar 1;862:160785. doi: 10.1016/j.scitotenv.2022.160785. Epub 2022 Dec 9.
Spodoptera frugiperda, the fall armyworm, causes major damage to maize and >80 other crops worldwide. Since S. frugiperda successfully invaded China in 2018 via long-distance migration from Myanmar, it has caused major maize yield losses and posed a severe threat to maize production and food security. The biocontrol approach for S. frugiperda using natural enemies is environmentally safe and effective. Estimating the potential suitable area (PSA) for S. frugiperda and its natural enemies can provide insights for its biocontrol and management. Therefore, based on the global distribution records and bioclimatic variables, we modeled the PSA of S. frugiperda and three egg parasitoids in China using an ensemble model (EM). We found that the prediction results of the EM were more reliable than those of a single model. The PSAs of S. frugiperda and its three egg parasitoids were mainly attributed to temperature variables. The PSA of S. frugiperda was divided into migratory and overwintering areas using the mean January 10 °C isotherm from 2018 to 2022. In the overwintering area, Trichogramma chilonis had the largest PSA overlap with S. frugiperda (94.57 %), followed by Telenomus remus (68.64 %) and Trichogramma dendrolimi (67.53 %). Telenomus remus and Tr. chilonis were the most effective egg parasitoids against S. frugiperda in the overwintering area. In the migratory area, Tr. chilonis had the largest PSA overlap with S. frugiperda (91.36 %), followed by Tr. dendrolimi (81.70 %) and Te. remus (15.23 %). Trichogramma dendrolimi would be the most effective egg parasitoid against S. frugiperda in the Yangtze River Basin and northeastern China. Trichogramma chilonis was the most effective egg parasitoid against S. frugiperda in central China. Our findings indicate that the three native egg parasitoids would be "good regulators" of S. frugiperda outbreaks in China.
草地贪夜蛾对全球范围内的玉米及80多种其他作物造成了严重危害。自2018年草地贪夜蛾从缅甸远距离迁飞成功入侵中国以来，已导致玉米产量大幅损失，对玉米生产和粮食安全构成了严重威胁。利用天敌进行草地贪夜蛾的生物防治方法既环保又有效。估算草地贪夜蛾及其天敌的潜在适生区（PSA）可为其生物防治和管理提供参考。因此，基于全球分布记录和生物气候变量，我们使用集成模型（EM）对中国草地贪夜蛾和三种卵寄生蜂的潜在适生区进行了建模。我们发现，集成模型的预测结果比单一模型更可靠。草地贪夜蛾及其三种卵寄生蜂的潜在适生区主要归因于温度变量。利用2018年至2022年1月平均10℃等温线将草地贪夜蛾的潜在适生区分分为迁飞区和越冬区。在越冬区，稻螟赤眼蜂与草地贪夜蛾的潜在适生区重叠最大（94.57%），其次是夜蛾黑卵蜂（68.64%）和松毛虫赤眼蜂（67.53%）。夜蛾黑卵蜂和稻螟赤眼蜂是越冬区防治草地贪夜蛾最有效的卵寄生蜂。在迁飞区，稻螟赤眼蜂与草地贪夜蛾的潜在适生区重叠最大（91.36%），其次是松毛虫赤眼蜂（81.70%）和夜蛾黑卵蜂（15.23%）。松毛虫赤眼蜂将是长江流域和中国东北地区防治草地贪夜蛾最有效的卵寄生蜂。稻螟赤眼蜂是中国中部地区防治草地贪夜蛾最有效的卵寄生蜂。我们的研究结果表明，这三种本土卵寄生蜂将是中国草地贪夜蛾爆发的“良好调控者”。
