草地贪夜蛾Spodoptera frugiperda J E Smmith、黏虫Mythimna separate Walker和稻纵卷叶螟Cnaphalocrocis medinalis Guenee是威胁我国粮食生产安全的重大迁飞性害虫,对当地粮食作物的产量和品质造成较大影响。明确3种重大迁飞性害虫...草地贪夜蛾Spodoptera frugiperda J E Smmith、黏虫Mythimna separate Walker和稻纵卷叶螟Cnaphalocrocis medinalis Guenee是威胁我国粮食生产安全的重大迁飞性害虫,对当地粮食作物的产量和品质造成较大影响。明确3种重大迁飞性害虫在广西沿海地区的种群动态,有助于揭示其在我国的迁飞规律,为当地乃至全国的监测预警及防控提供科学依据。研究于2023年9月至2024年5月在广西东兴市利用高空测报灯对3种重大迁飞性害虫进行诱集,并对3种害虫的发生动态进行分析。结果显示:高空测报灯下,黏虫和稻纵卷叶螟的诱集量远高于草地贪夜蛾,虫量发生季节性差异明显,大部分虫量诱集于春季的3—5月;稻纵卷叶螟高空测报灯下出现3次高峰,分别为9月中旬、4月上旬及5月上旬,其中5月上旬诱虫量最高;黏虫高峰期出现在3月初至3月中旬,峰值呈现双峰型,高峰日出现在3月17日(1027头);草地贪夜蛾虽在3月下旬至4月下旬出现2个高峰,但峰值不高。总体上,3种迁飞性害虫的种群发生量差异较大,草地贪夜蛾的诱集量最低,迁飞高峰期集中于春季,但高峰期出现时间错开,黏虫最早(3月),其次为稻纵卷叶螟(4月),草地贪夜蛾最晚(5月),相关部门可根据害虫的种群动态,在3种害虫相应的高发期进行重点监测与防控。展开更多
The fall armyworm(FAW),Spodoptera frugiperda(J.E.Smith),is an important agricultural pest with a strong migratory ability.While the species is native to the Americas,it has recently invaded China,ravaging crops in man...The fall armyworm(FAW),Spodoptera frugiperda(J.E.Smith),is an important agricultural pest with a strong migratory ability.While the species is native to the Americas,it has recently invaded China,ravaging crops in many provinces(autonomous regions,municipalities).Its long-distance migration,which is critical to understand for pest management programs,has been well studied in its native region.In other regions however,the moth’s migration patterns have not yet been characterized.Here,the migratory behavior of FAW populations in China was studied on an isolated island located in the center of the Bohai Strait from spring to autumn 2019,the year in which FAW first reached this region,by using searchlight trapping,stable carbon isotopes and trajectory simulation.The main results were summarized as follows:(i)The number of FAW moths caught by searchlight trapping provided direct evidence that the species migrated across the Bohai Sea.(ii)Species identification was confirmed by both morphology and molecular methods,and only the"corn-strain"that preferentially infests maize and sorghum was found in the collections.(iii)Stable carbon isotope measurements showed that up to 95.07%of captured moths displayed the C4 isotope signature,thus providing additional evidence that this species is a migrant as there are no major C4 plants at the trapping site.(iv)Backward trajectory analysis indicated that the pest now threatens to expand its range into the agriculturally important region of Northeast China,and thus authorities in this region should be vigilant to the threat posed by this species.Together,these findings add to our knowledge concerning the occurrence of FAW in northern China,and will help us to develop sustainable and effective monitoring,forecasting,and pest management strategies.展开更多
文摘草地贪夜蛾Spodoptera frugiperda J E Smmith、黏虫Mythimna separate Walker和稻纵卷叶螟Cnaphalocrocis medinalis Guenee是威胁我国粮食生产安全的重大迁飞性害虫,对当地粮食作物的产量和品质造成较大影响。明确3种重大迁飞性害虫在广西沿海地区的种群动态,有助于揭示其在我国的迁飞规律,为当地乃至全国的监测预警及防控提供科学依据。研究于2023年9月至2024年5月在广西东兴市利用高空测报灯对3种重大迁飞性害虫进行诱集,并对3种害虫的发生动态进行分析。结果显示:高空测报灯下,黏虫和稻纵卷叶螟的诱集量远高于草地贪夜蛾,虫量发生季节性差异明显,大部分虫量诱集于春季的3—5月;稻纵卷叶螟高空测报灯下出现3次高峰,分别为9月中旬、4月上旬及5月上旬,其中5月上旬诱虫量最高;黏虫高峰期出现在3月初至3月中旬,峰值呈现双峰型,高峰日出现在3月17日(1027头);草地贪夜蛾虽在3月下旬至4月下旬出现2个高峰,但峰值不高。总体上,3种迁飞性害虫的种群发生量差异较大,草地贪夜蛾的诱集量最低,迁飞高峰期集中于春季,但高峰期出现时间错开,黏虫最早(3月),其次为稻纵卷叶螟(4月),草地贪夜蛾最晚(5月),相关部门可根据害虫的种群动态,在3种害虫相应的高发期进行重点监测与防控。
基金funded by the National Natural Science Foundation of China(31901873 and 31727901)the Central Public-interest Scientific Institution Basal Research Fund,China(CAAS-ZDRW202007)。
文摘The fall armyworm(FAW),Spodoptera frugiperda(J.E.Smith),is an important agricultural pest with a strong migratory ability.While the species is native to the Americas,it has recently invaded China,ravaging crops in many provinces(autonomous regions,municipalities).Its long-distance migration,which is critical to understand for pest management programs,has been well studied in its native region.In other regions however,the moth’s migration patterns have not yet been characterized.Here,the migratory behavior of FAW populations in China was studied on an isolated island located in the center of the Bohai Strait from spring to autumn 2019,the year in which FAW first reached this region,by using searchlight trapping,stable carbon isotopes and trajectory simulation.The main results were summarized as follows:(i)The number of FAW moths caught by searchlight trapping provided direct evidence that the species migrated across the Bohai Sea.(ii)Species identification was confirmed by both morphology and molecular methods,and only the"corn-strain"that preferentially infests maize and sorghum was found in the collections.(iii)Stable carbon isotope measurements showed that up to 95.07%of captured moths displayed the C4 isotope signature,thus providing additional evidence that this species is a migrant as there are no major C4 plants at the trapping site.(iv)Backward trajectory analysis indicated that the pest now threatens to expand its range into the agriculturally important region of Northeast China,and thus authorities in this region should be vigilant to the threat posed by this species.Together,these findings add to our knowledge concerning the occurrence of FAW in northern China,and will help us to develop sustainable and effective monitoring,forecasting,and pest management strategies.
