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对南方水稻黑条矮缩病田间症状类型、症状表现时间、不同时间种植类型水稻发病差异、当前主要发病品种(或组合)、白背飞虱在本地发生规律、田间病丛分布特征等进行了初步研究。结果表明,南方水稻黑条矮缩病的症状有典型和非典型、重症和轻症之分;在双季早稻、中稻、单季晚稻和双季晚稻混栽地区,以中稻、单季晚稻和双季晚稻发生较普遍,早稻发病较轻,这与白背飞虱在本地的发生期同各种时间种植类型水稻易感病生育期吻合程度有关;不同类型水稻发病程度不同,籼型杂交稻发病重于常规粳、糯稻,似与白背飞虱嗜食杂交稻的习性有关;品种间发病程度有差异,如奥两优28、华安3号等部分品种发病严重;病丛(株)在田间呈聚集分布。
The field symptom types, symptom appearance time, differences in rice types at different times of planting, main current disease varieties (or combinations), local occurrence patterns of Sogatella furcifera, distribution characteristics of field diseased plexuses initial research. The results showed that there were typical and atypical, severe and mild symptoms of black-streaked dwarf disease in southern China. In the areas of double-crop early rice, mid-season rice, single-season late rice and double-season late- The occurrence of late rice in double season was more common, and the incidence of early rice was lighter, which was related to the anastomosis degree of whitebacked planthopper in the local occurrence period and the susceptible stage of rice susceptible at various times. Different indica hybrid rice The incidence was heavier than that of conventional japonica and glutinous rice, which might be related to the habit of hybrid feeding on whitebacked planthopper, Aggregation distribution.