Distribution of the landing area for spring and summer emigrants of the fall armyworm,Spodoptera frugiperda in Guangdong Province
To determine the landing area of spring and summer emigrants of Spodoptera frugiperda in Guangdong Province,the migratory trajectory and landing area of the fall armyworm during spring and summer were simulated and analyzed using a three-dimensional trajectory analysis program supported by the WRF 4.0 model,utilizing monitoring data of the fall armyworm in various ecological regions of Guangdong Province from 2020 to 2021.The results indicated that the fall armyworm moths in Guangdong Province predominantly migrated northeastward during spring and summer reasons.Over 80％of the fall armyworm emigrants from Guangdong Province landed in South China and the southern region of the Yangtze River.While a few moths could reach the Yangtze-Huaihe River Valley,Huang-Huaihe River Valley,Taiwan,Southeast Asia,Japan and South Korea.Most emigrants of the fall armyworm in Guangdong Province primarily landed in South China between March and April.Subsequently,the landing area of the fall armyworm gradually shifted northward from May to June,with a significant increase in trajectory landing points in Fujian and Jiangxi Province.The southern region of the Yangtze River became the primary landing area for fall armyworm emigrants from Guangdong Province during July.Furthermore,the accuracy of the migration trajectory simulation was validated through three case studies in Dingnan of Jiangxi,Zhouning of Fujian and Tongxiang of Zhejiang.This study identified Guangdong Province as one of the key source areas for fall armyworm in the southern region of the Yangtze River and South China during its northward migration period.
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NSTL
万方数据
