Immigration and infection dynamics of southern rice black-streaked dwarf virus in Xing'an,Guangxi
Xing'an county in Guangxi is located in the migration corridor of Sogatella furcifera(Horváth),the vector transmitting southern rice black-streaked dwarf virus(SRBSDV).This paper aims to ascertain the immigration and infection dynamics of SRBSDV in Xing'an.Adult S.furcifera were trapped using searchlights,and both field-collected S.furcifera and rice leaves were assessed for their SRBSDV viruliferous status using dot-ELISA.The immigration of virus-infecting S.furcifera began in the late May,and the virus infection rate reached the highest in mid and late June in 2021-2022.Virus infection rate of S.furcifera collected from rice fields was relatively high in early to late July ranging from 10％to 15％.Similarly,rice samples collected from mid-July to early August exhibited a high SRBSDV-infecting rate,ranging from 10％to 14％.A significant correlation was observed between the virus infection rates of rice and S.furcifera.These results hold significance for monitoring and forecasting SRBSDV outbreaks in northern Guangxi and the middle and low reaches of the Yangtze River valley.
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