根据1964-1966年间的调查研究结果,水稻黄矮病毒只能侵染水稻,不能通过病稻的种子传给后代,用病叶汁液磨擦法不能传病,病株“恢复”后其体内仍保持有病毒。晚稻病株“再生稻”存活越冬后,其体内亦保持有病毒,所以越冬病株再生稻是本病在广东的一个初侵染源,但其重要性还有待进一步调查研究。 此病毒的媒介昆虫为大斑黑尾叶蝉和二点黑尾叶蝉(黑尾叶蝉当时无发现)。大斑黑尾叶蝉的最短获毒饲育期少于5分钟,循回期一般为11天左右,最短为4～5天,最长为27天。保毒虫能继续传毒至死。但在开始传毒1～2天后,有些个体有一天(个别二天)的间歇传毒现象。大斑黑尾叶蝉最短传毒饲育期少于3分钟。此病毒不能通过带毒叶蝉所产的卵而传给若虫。孵化后立即在病株上取食的若虫,在第二令以后就能传毒。若虫的传毒能力与成虫差异不大,其循回期似比成虫的稍短。由于媒介叶蝉在广东的冬季还可发生1～2代,不能以带毒若虫或成虫越过整个冬季,所以在广东的媒介叶蝉不成为本病的初侵染源,因而广东早稻往往发病较迟较少。1966年曾在广州华南农学院农场(1955年晚稻发病较多)进行大田带毒虫率调查,从2月至5月上旬没有发现任何带毒叶蝉。从5月13日开始才发现少数带毒虫,这进一步证明了广东当地越冬后的媒介叶蝉是不带黄矮病毒的。因此 According to the survey results from 1964 to 1966, rice yellow dwarf virus can only infect rice, can not pass the seeds of the diseased rice to the offspring, diseased leaves juice friction method can not be transmitted, the diseased plant “restored” after the body remains Virus. Late rice “ratooning rice” survive overwintering, its body also maintains a virus, so overwintering diseased ratoon rice is a primary source of infection in Guangdong, but its importance remains to be further investigated. The vector virus of this virus is Nephotettix cincticeps and Nephotettix cincticepsis (black leafhopper was not found at that time). The shortest poisonous feeding period is less than 5 minutes, the return period is generally about 11 days, the shortest is 4 to 5 days, the longest is 27 days. Poisons can continue to poison to death. However, in the first to 1 to 2 days after the start of the poisoning, some individuals have one day (individual two days) intermittent poisoning phenomenon. The largest spot black leafhopper poisoning minimum feeding period of less than 3 minutes. The virus can not be transmitted to nymphs through the eggs produced by poisonous leafhoppers. The nymphs feeding on diseased plants immediately after hatch can be poisoned after the second order. The nymph’s ability to transmit and adults is not very different, and its return period is slightly shorter than that of adults. As the media leafhoppers in Guangdong in winter can occur 1 to 2 generations, can not take poisonous nymphs or adults across the winter, so the media in Guangdong, leafhoppers do not become the initial source of infection, so the early rice is often more incidence of Guangdong than Later less. 1966 in South China Agricultural College in Guangzhou farm (late 1955 more incidence of late rice) field poison bug survey, from February to early May did not find any poisonous leafhopper. From May 13, only a few were found with poisonous insects, which further proves that the local leafhoppers in Guangdong overwintering are yellow dwarf virus. therefore