西安地区樱桃李属坏死环斑病毒病鉴定和田间发生规律

Identification of PNRSV and Its Regularity of Outbreak in Cherry of Xi'an Region

通过实验室鉴定、田间定点监测和大田调查,发现樱桃李属坏死环斑病毒病可通过嫁接、汁液摩擦等途径传播,病毒形态为球形,大小30 nm,无包膜;在西安地区年发生消长历经始发期、快速增长期、稳定期、衰退期4个阶段,一年具有两个发病高峰,相邻年份病害发生差异不大,但有一个缓慢增长的过程。川道、密度大、管理粗放有利于樱桃李属坏死环斑病毒病的发生,目前种植的大樱桃品种发病较重,当地小樱桃品种发病较轻。

According to the lab identification,field site-directed monitoring,and field investigation,It indicated that the PNRSV in cherry could be transmitted by grafting and mechanical inoculation.Observation of transmission electron microscope revealed that the virion of PNRSV is about 30nm,circular and nonencapsulated.The disease development process mainly includes 4 stages,beginning,rapid growth,stable and decline period.There are two morbidity peaks each year.Little differences among years but still at a rate of slow increasing.The flat field,big density and extensive management are favorable for the occurrence of PNRSV.At present,the disease occurred more serious in sweet cherry,but less in the local cherry.