大麦黄条点花叶病毒传播方式和传播特性研究初报

大麦黄条点花叶病毒(Barley yellow striate mosaic virus,BYSMV)是我国小麦产区新发现的一种病毒,为了明确该病毒的发生流行规律并建立相应的防治方法,在温室条件下对该病毒的传播方式、介体传毒特性进行了研究。初步研究结果表明:BYSMV仅由介体昆虫灰飞虱(Laodelphax striatellus Fallén)传播,不能通过机械摩擦、土壤和病残体传播。该病毒在灰飞虱体内的循回期最短为6 d,接种后20 d达到传毒发病盛期。灰飞虱最短获毒和传毒时间均为1 min,病毒在小麦苗中的最短潜育期为5 d。由此可见,灰飞虱对BYSMV具有较强的获毒和传毒能力。本研究为下一步进行该病毒的寄主范围、病害的发生规律等方面的研究提供了技术手段,也为生产上预防和控治由该病毒引起的病害提供了理论依据。

Preliminary report on transmission pattern and characteristics of Barley yellow striate mosaic virus by the insect vector

Barley yellow striate mosaic virus (BYSMV) is a newly identified virus causing disease in wheat-growing regions in China. Investigation of the transmission pattern and characteristics of the BYSMV by the insect vector is important to determine the periodicity of this disease so as to develop effective preventive methods. Preliminary results revealed that BYSMV could only be transmitted by Laodelphax striatellus Fallén. In Laodelphax striatellus Fallén, the minimum virus circulative periods was 6 days. Both the minimum viral acquisition periods of second- and third-instar nymphs and the inoculation feeding time were 1 min. For wheat seedlings, the minimum latent period of BYSMV was 5 days. These results indicated that Laodelphax striatellus Fallén has a high capacity for acquisition and transmission of BYSMV. This study provides the experimental basis for further study of the host range and disease circle of BYSMV, and also was helpful for the development of effective antiviral strategies.