论文部分内容阅读
南方水稻黑条矮缩病自2001年首次在中国发现后,已发展成为中国水稻生产中重要的病毒病害。2009年以来的发病情况表明,其在全国的发病范围总体呈扩展趋势,表现为南方重于北方、中晚稻重于早稻、杂交稻重于常规稻、籼稻重于粳稻等特点。在发生时空分布上,华南稻区属早发毒源区,完成前期毒源积累;江南稻区为常发、重发区;西南南部低热河谷稻区毒源可以越冬,局部发病严重;长江中、下游稻区为波及区,病害仅在重发年份才比较严重;江淮稻区为零星分布区,一般年份难查见。笔者在研究总结近年来病害流行分布现状和特点的基础上,阐明了其在中国南方和越南中北部通过白背飞虱远距离迁飞扩散完成毒源越冬存续、侵染发病、传毒扩散、跨境跨区传播等大区传播危害规律。
After its first discovery in China in 2001, the southern rice black-streaked dwarf disease has developed into an important viral disease in China’s rice production. The incidence of the disease since 2009 shows that the incidence of the disease in the country shows an overall trend of expansion, showing that the south is heavier than the north, the late rice is heavier than the early rice, the hybrid rice is heavier than the conventional rice, and the indica rice is heavier than the japonica rice. In the spatiotemporal distribution, the southern China rice area belongs to the early-onset source area and accumulates the poisonous source in the early period. The southern rice area is the frequent recurrence area and the recurrent area. The source of the low-heat valley rice in the south- , The lower reaches of the rice area is affected area, the disease is only serious in the year of relapse; Jianghuai rice area is sporadic distribution area, the general year difficult to see. On the basis of summarizing the current situation and characteristics of epidemic distribution in recent years, the author clarifies that it survived the source of infection through the long-distance relocation and dispersal of whitebacked planthoppers in the southern and southern parts of Vietnam, Cross-border cross-regional dissemination and other regions of the spread of harmful laws.