Interannual and seasonal migratory patterns of wheat aphids across the Bohai Strait in eastern Asia

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY
Xingya Wang, Haotian Ma, Ying Gao, Mingli Yu, Yuechao Zhao, Kongming Wu
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Abstract

The bird cherry‐oat aphid (Rhopalosiphum padi) and the grain aphid (Sitobion miscanthi) are two destructive wheat pests that have caused severe economic losses in China's main wheat‐producing regions. Although previous studies have focused mainly on the population dynamics of wheat pests in wheat fields, little is known about the trans‐sea migration of both wheat aphid species in eastern China. Here, we conducted 10 years of monitoring from 2012 to 2021 to determine aerial migration patterns utilizing a suction trap on Beihuang Island (BH), a small island in the centre of the Bohai Strait that serves as a seasonal insect migratory pathway in eastern Asia. We also simulated the migration trajectories of these pests using the HYSPLIT model. Overall, a total of 6362 alatae S. miscanthi and 335 alatae R. padi were captured, and both wheat aphid species exhibited regular patterns of comigration across the sea from late April to late October each year. There were significant interannual and seasonal differences in the migratory numbers of both wheat aphids. Notably, the average daily humidity was the most important meteorological factor affecting migration biomass. The seasonal migration trajectories simulated using the HYSPLIT model revealed different source areas for both wheat aphid species, which mostly originated in Northeast, North and East China. Accordingly, our study provides valuable insights into the occurrence and migration route of wheat aphids in eastern Asia, helps fine‐tune forecasting and early warning systems, and thereby guides integrated pest management of wheat aphids in eastern Asia.
亚洲东部渤海海峡两岸小麦蚜虫的年际和季节迁徙模式
雀麦蚜(Rhopalosiphum padi)和谷粒蚜(Sitobion miscanthi)是两种毁灭性小麦害虫,给中国小麦主产区造成了严重的经济损失。以往的研究主要集中于麦田害虫的种群动态,但对这两种小麦蚜虫在华东地区的跨海迁徙情况知之甚少。北隍岛位于渤海海峡中心,是亚洲东部季节性昆虫迁徙通道上的一个小岛,我们在此开展了从 2012 年到 2021 年的 10 年监测,利用吸式诱捕器确定空中迁徙模式。我们还利用 HYSPLIT 模型模拟了这些害虫的迁徙轨迹。总计捕获了 6362 头麦蚜(S. miscanthi)和 335 头麦蚜(R. padi),这两种麦蚜在每年 4 月下旬至 10 月下旬期间都有规律地跨海迁徙。两种麦蚜的迁徙数量存在明显的年际和季节差异。值得注意的是,日平均湿度是影响迁徙生物量的最重要气象因素。利用 HYSPLIT 模型模拟的季节性迁飞轨迹显示,两种小麦蚜虫的来源地区不同,主要分布在东北、华北和华东地区。因此,我们的研究为了解亚洲东部小麦蚜虫的发生和迁徙路线提供了宝贵的信息,有助于调整预报和预警系统,从而指导亚洲东部的小麦蚜虫害综合防治工作。
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来源期刊
CiteScore
3.40
自引率
5.30%
发文量
132
审稿时长
6 months
期刊介绍: The Journal of Applied Entomology publishes original articles on current research in applied entomology, including mites and spiders in terrestrial ecosystems. Submit your next manuscript for rapid publication: the average time is currently 6 months from submission to publication. With Journal of Applied Entomology''s dynamic article-by-article publication process, Early View, fully peer-reviewed and type-set articles are published online as soon as they complete, without waiting for full issue compilation.
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