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Journal of Tea Science ›› 2020, Vol. 40 ›› Issue (1): 105-112.doi: 10.13305/j.cnki.jts.20191202.001

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The Fall Armyworm Spodoptera frugiperda may Transfer to Damage Tea Plant (Camellia sinesis)

SUN Xiaoling1,2, CHEN Chengcong3, LI Ning1,2, LIU Fengjing4, DONG Ya′nan1,2, QIAN Xiaona1,2, XING Yuxian1,2, LIU Miaomiao1,2, LI Xiwang1,2   

  1. 1.Tea Research Institute of the Chinese Academy of Agricultural Sciences, Hangzhou 310008, China;
    2. Key Laboratory of Tea Biology and Resources, Hangzhou 310008, China;
    3. National Research Center of Engineering and Technology of Tea Quality and Safety, Quanzhou 362400, China;
    4. The Tea Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350000, China
  • Received:2019-10-11 Revised:2019-10-31 Online:2020-02-15 Published:2020-02-04

Abstract: Spodoptera frugiperda is a world-class major migratory pest with a wide range of hosts. The growth fitness of S. frugiperda larvae feeding on maize and tea leaves was studied. The result shows that the mortality rate of the newly emerged larvae feeding on tea leaves was as high as 100% for 8 d. Weight gain of 3rd instar larvae feeding on maize leaves was significantly higher than that of larvae feeding on tea leaves. After feeding for 3 d and 6 d, the weight gains of larvae feeding on tea leaves were 35.58% and 36.67% of those feeding on maize leaves respectively. Growth fitness of larvae feeding on maize leaves was significantly better than larvae feeding on tea leaves. The main manifestations are as follows: (1) the survival rate of the old larvae feeding on the maize leaves for 8 d was 20% higher than that feeding on tea leaves. (2) the pupation rate of 9-daysinstar larvae feeding on tea leaves was 54.17%. (3) the developmental period of the larvae feeding on tea leaves was significantly longer than that of the larvae feeding on the maize leaves. moreover, the pupa weight, length and width of the larvae feeding on maize leaves were significantly higher than those of the larvae feeding on tea leaves. Although the performance of S. frugiperda feeding on tea leaves was significantly lower than that feeding on maize leaves, some weeds species are the host of S. frugiperda and 3rd instar larvae feeding on tea leaves could pupate successfully. Thus it is reasonable to speculate that if S. frugiperda migrates to the tea plantation or nearby, the larvae may transfer to damage tea plants with some weeds acting as intermediate.

Key words: tea plant, Spodoptera frugiperda, transfer damage, possibility

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