Initial detections and spread of invasive Spodoptera frugiperda in China and comparisons with other noctuid larvae in cornfields using molecular techniques

• 来源期刊: 中国昆虫科学（英文版）
• 关键词: corn molecular identification Mythimna separata Spodoptera exigua Spodoptera frugiperda Spodoptera litura
• 年，卷（期）: 2020,（4）
• 页码范围: 780-790
• 页数: 11页
• 语种: 英文
• DOI: 10.1111/1744-7917.12700

摘要

The fall armyworm,Spodopterafrugiperda,is a species native to the Americas and has spread to many countries in Africa and Asia in recent years.Proactive actions for potential invasion of S.frugiperda to China coordinated by government agencies and agricultural extension systems resulted in timely detection in January 2019 in Yunnan province neighboring onto Myanmar.The extensive monitoring in southern provinces of China since February 2019 resulted in dynamic tracking ofS.frugiperda spreading to 13 provincial regions in China within 4 months by May 10,2019,which is crucial for timely management actions in the fields.The first detections of S.frugiperda (corn strain) in China were confirmed using cytochrome oxidase subunit 1 (CO 1) and triosephosphate isomerase (Tpi) genes molecular marker method.In addition to S.frugiperda,larvae of three other noctuid species with similar morphological appearance (S.litura,S.exigua and Mythimna separata) can occur simultaneously and cause similar damage in cornfields in southern China.Thus,we can use both morphological and molecular marker methods to compare larval stages of four noctuid species.Further,we discuss the risk of potential spread of invasive S.frugiperda to other regions and impact on corn production in China.