浙江武义2009年南方水稻黑条矮缩病的毒源地分析

2009年， 浙江省境内首次出现南方水稻黑条矮缩病毒(Southern rice black streaked dwarf virus， SRBSDV)， 且仅武义县有发病现象。因为该病毒病是一种虫媒病毒， 且白背飞虱Sogatella furcifera (Horváth)是主要传毒介体， 所以本文通过白背飞虱灯下诱虫情况调查、 迁飞轨迹模拟、 天气学背景分析以及毒源地分析， 阐释了2009年浙江省武义县发现的南方水稻黑条矮缩病的供毒源地分布情况， 以及白背飞虱携毒的传递路径， 并讨论了轨迹模拟中各生物学参数的设定方法， 从而为剖析该病毒的宏观流行规律奠定科学基础。结果显示：(1) 通过对白背飞虱迁入武义的主要虫源地与经鉴定的南方水稻黑条矮缩病发病区域的叠加分析， 明确了浙江武义的可能毒源地分布于两广、 闽南、 赣南四省区境内； (2) 西南低空急流及偏南气流是白背飞虱将我国南方的病毒远距离传送到武义县境内的动力源； (3) 白背飞虱随下沉气流和降雨在武义境内的集中降落是南方水稻黑条矮缩病在当地暴发的触发条件。

Tracking the source regions of Southern rice black-streaked dwarf virus (SRBSDV)occurred in Wuyi county, Zhejiang province, China in 2009, transmitted by Sogatella furcifera(Horváth)(Homoptera: Delphacidae)

In 2009, Southern rice black-streaked dwarf virus (SRBSDV) appeared first time in Zhejiang province, while only in Wuyi county morbidity phenomenon occurred. Since this virus is a kind of arbovirus, and the white-backed planthopper, Sogatella furcifera (Horváth) (WBPH), is its main transmitted vector, we used light trap catch data, migration trajectory simulation, synoptic meteorological background and virus infection to study the pathways of WBPH in Wuyi, Zhejiang, 2009. In this way, the possible source regions of SRBSDV transmitted by its vector WBPH were analyzed, and the biological parameters for trajectory analysis were determined based on the numerical simulation. This research aims to establish scientific basis for the macro-epidemic researching of SRBSDV. The results illustrated that: (1) through the overlapping analysis of the virus incidence area and the main WBPH source regions of Wuyi imitated through backward trajectory simulations, the possible virus source areas of Wuyi were mainly distributed in Guangdong, Guangxi, southern Fujian and southern Jiangxi provinces or regions. (2) Riding on the prevailing southwest wind or south wind, WBPH transmitted this virus from southern China to Wuyi. (3) It was the immigration of concentrated airborne WBPH with downdraft and rainfall that triggered the epidemic outbreak of SRBSDV in Wuyi in 2009.