摘要
水稻条纹叶枯病是由灰稻虱传播的病毒病,在我国南北稻区均有发生,且常年流行为害。目前主要采用抗病品种结合适期治虫防治该病,其中种植抗病品种是一条有效途径。为了搞清品种抗性与条纹叶枯病的关系,作者于1990～1991年进行了不同抗性品种与发病潜育期、发病率及对病毒耐受力之间关系的研究。1 材料与方法1.1 供试品种人工接种方法筛选得到的抗性品种盐粳20、中抗品种中国91、感病品种秀水11和高感品种秀水04、黎优57。1.2 灰稻虱经卵带毒虫的筛选和繁殖从病区采集越冬代若虫在健苗上饲养至成虫,取雌成虫以单虫单苗置两端通的大试管内饲食48 h,稻苗编号种植于塑料框中,雌成虫按编号与雄虫配对饲养于分蘖期健稻上,让其产卵。
Rice stripe viruses (RSV) were inoculated into grain buds of resistant and susceptible varieties with Laodelphax striatallus, 70% of which is viruliferous. It takes three days for resistant varieties to reach almost the highest disease incidences and only two days for the susceptible. At 27-30℃, the disease latent periods of resistant varieties are 10-13 days, the initial and the final disease incidences are 3%-4% and 25%-35%, respectively. These of susceptible varieties are only 5-6 days, their initial and final disease incidences are 28%-33% and 87%-100%, respectively. The susceptible varieties are apt to die and the resistant ones are not when infected by viruses.
出处
《中国水稻科学》
CAS
CSCD
北大核心
1993年第1期58-60,共3页
Chinese Journal of Rice Science
关键词
抗病性
水稻
品种
纹枯病
Desease resistance
Laodelphax striatallus
Rice variety
