Stable Isotopes Indicate Seasonal Changes in Natal Geographic Origins and Host Plants of Ostrinia furnacalis (Guenee) Migrants Across the Bohai Strait in China

文献类型： 外文期刊

第一作者： Shen, Xiujing

作者： Shen, Xiujing;Guo, Jianglong;Yang, Xianming;Wu, Kongming;Shen, Xiujing;Wei, Shujun;Guo, Jianglong

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关键词： Ostrinia furnacalis; seasonal migration; stable isotope; origin; host plant

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.447； 五年影响因子：2.483 ）

ISSN： 0022-0493

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收录情况： SCI

摘要： The Asian corn borer, Ostrinia furnacalis (Guenee), is a notorious pest of maize that migrates seasonally in Asia. Two migration peaks were found on Beihuang island in the Bohai Strait of China by observing the number of migrants. However, the origins and host plants of the migrants in the two migration periods remain unclear. Here, stable hydrogen (delta H-2) and carbon (delta C-13) isotope levels were measured to infer the origin and host plants of the O. furnacalis captured on Beihuang island in 2017-2019. delta H-2 in wings of spring-summer O. furnacalis captured from May to June ranged from -99 to -56 parts per thousand, while that of autumn migrants from August to September ranged from -127 to -81 parts per thousand. Based on the linear relationship between delta H-2 in the wing of migrants (delta H-2(w)) and delta H-2 in precipitation (delta H-2(p)), the spring-summer O. furnacalis likely originated from the summer maize area in the Huang-Huai-Hai Plain in China. In contrast, the autumn migrants came from the northern spring maize area in Liaoning, Jilin and Inner Mongolia. Based on delta C-13, the spring-summer migrants fed on both C-3 plants such as wheat (47.76%) and C-4 weeds or belonged to the over winter individuals in maize field (52.24%), while the autumn migrants mainly fed on maize (C-4, 91.21%). The results point to a northward migration in spring-summer and southward migration in autumn of O. furnacalis. Our study gives an important knowledge for improving the forecasting and management level of this pest.

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