Population Source of Third-Generation Oriental Armyworm in Jilin, China, Determined by Entomology Radar, Trajectory Analysis, and Mitochondrial COI Sequences

文献类型： 外文期刊

第一作者： Sun, Wei

作者： Sun, Wei;Su, Qianfu;Wang, Yangzhou;Yang, Wei;Zhou, Jiachun;Gao, Yuebo;Hu, Gao

作者机构：

关键词： Mythimna separata (Walker); Northeast China; radar; molecular marker; population structure

期刊名称：ENVIRONMENTAL ENTOMOLOGY （ 影响因子：2.387； 五年影响因子：2.194 ）

ISSN： 0046-225X

年卷期： 2022 年 51 卷 3 期

页码：

收录情况： SCI

摘要： The armyworm, Mythimna separata (Walker) (Lepidoptera: Noctuidae), is an important polyphagous pest with a strong migratory ability. Recently, third-generation larvae have become an increasingly serious pest threat in Jilin Province of northeast China. To investigate the population source of this species, scanning entomological radar observations and insect mitochondrial cytochrome oxidase I (COI) genes were used in this study. Five main results were found: (1) The peak period in captured second-generation moths was from mid to late July. The temperature and wind speeds were optimum for the moths to have migrated. Strong southwesterly winds occurred during the peak migration period. (2) Radar observations indicated that most of the moths' migration took place at a height of 600 m, often in a dense layer which formed at heights of 350-800 m. (3) Analyses of adult ovarian development and larval haplotypes showed third-generation larvae were progeny of both locally produced progeny and immigrant moths. (4) Based on our back-tracking and haplotype analyses, immigration led to an outbreak originated in the same source area to the southwest. (5) Emigration of second-generation moths was confirmed by both radar observation and mtDNA analysis. Forward trajectories indicated that the moths were capable of immigrating far from their overwintering range. These results are useful for improving the forecasting systems of this insect pest species.

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