Cold hardiness of the invasive fall armyworm,Spodoptera frugiperda in China  

作　　者：ZHANG Dan-dan ZHAO Sheng-yuan WU Qiu-lin LI Yu-yan WU Kong-ming 

机构地区：[1]State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,P.R.China

出　　处：《Journal of Integrative Agriculture》2021年第3期764-771,共8页农业科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31727901 and 31901873);the National Key Research and Development Program of China(2019YFD0300101)。

摘　　要：Fall armyworm,Spodoptera frugiperda(J.E.Smith,1797),a crop pest native to tropical and subtropical regions of America,has invaded and spread into most regions in China,posing a severe threat to China’s agriculture.The cold hardiness directly determines its geographic distribution through adapting to winter temperatures of different regions.Here,we measured supercooling points and lethal time(LT)at low temperatures of S.frugiperda.The supercooling points for developmental stages in increasing order were:adults(-15.05℃)<pupae(-13.25℃)<prepupae(-10.50℃)<larvae(-9.03℃).Among eggs and 1st to 4th in star larvae,the 99%lethal time(LT_(99))was the highest for 4th in star larvae,with 99%of larvae dying after 18.59 d at 2℃,58.72 d at 7℃,and 66.28 d at 13℃.LT_(99) was the lowest for eggs with LTgg of 5.33 d at 2℃,9.28 d at 7℃,and 12.97 d at 13℃.This study provides mn understanding of overwintering regions of S.frugiperda in China which will be helpful for population forecasting and management.

关 键 词：Spodoptera frugiperda supercooling point OVERWINTER China 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]