摘要
:28~30℃条件下,用相同数量、带毒率为50~51%的灰飞虱经卵毒虫,分别接种于抗水稻条纹叶枯病品种与感病品种上,表明品种间的抗性由种质决定;抗性品种的发病潜育期为10~13天,起始发病率为25~35%,最终发病率为24~35%,卷叶症状0~25%;感病品种发病潜育期为5~6天,起始发病率为175~330%,最终发病率为87~100%,卷叶症状70~90%;介体昆虫在感病品种上的繁殖率分别为抗病品种盐粳20、中国91的165和161。
At 28~30℃, rice stripe viruses (RSV) were inoculated into grain buds of resistant and susceptible varieties respectively with equal Laodelphax striatella, 50~51% of which are viruliferous. It is showed that the varietal resistance is decided by its plasma germ; the disese latent periods of resistant varieties are 10~13 days; the initial and the final disese incidences are 2.5~3.5% and 25~35%, respectively. These susceptible varieties are only 5~6 days for disease latent period, and their initial and final disease incidences are 17.5~33% and 87~100%, respectively. The ratio of vector number propagated in susceptible varieties to propagated in resistant ones is about 1.65.
出处
《浙江农业学报》
CSCD
1994年第3期146-149,共4页
Acta Agriculturae Zhejiangensis
关键词
水稻
条纹叶枯病
抗病性
品种
Rice stripe viruses (RSV)
LaodelphaX striatellus
Viruliferous