The fall armyworm Spodoptera frugiperda may transfer to damage tea plant (Camellia sinesis).
Spodoprera frugiperda is a world-class major migratory pest with a wide range of hosts. The growth fitness of S. frtegiperda 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 3fd 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 ceding 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 fccding 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 3° 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.