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农学学报

农学学报 ›› 2010, Vol. 0 ›› Issue (8): 0-0.

所属专题： 水稻

• 植物保护 •    

水稻黑条矮缩病大面积发生情况的调查初报

李涛   

  • 收稿日期:2010-04-26 修回日期:2010-06-24 出版日期:2010-08-10 发布日期:2010-08-10
  • 基金资助:

    国家863计划子课题“强优势水稻杂交种的创新和应用”

Preliminary Report of the large occurrence of Rice Black Streaked Dwarf Virus

  • Received:2010-04-26 Revised:2010-06-24 Online:2010-08-10 Published:2010-08-10

摘要：

辰溪县2009年中、晚稻不同程度发生水稻黑条矮缩病，发病面积3666.67ha,中稻发病率17.96%，晚稻发病率21.18%，一般减产10%-20%，严重田块达70%以上甚至绝收。田间白背飞虱发生量远远大于褐飞虱，分别在6月下旬和7月下旬出现两次高峰，而白背飞虱是水稻黑条矮缩病的重要传播媒介，因此导致中、晚稻大面积发生此病。在不同的水稻品种中，中优288、T优272、Ⅱ117、宜S晚2号、华两优4480等均为易感病品种，发病率达50%以上。而岳优9113的发病率≤5%，比较抗病。

关键词: CaCl2, CaCl2, GA3, 种子活力, 玉米

Abstract:

Medium and late rice were affected by rice black streaked dwarf virus in varying degrees in Chenxi County in 2009.Incidence area was of 3,666.67 ha. Incidence rate of medium rice was at 17.96% and that of late rice at 21.18%. Yield loss was generally at 10% -20%, severely at 70 % or even no gain. Quantities of white-backed planthopper were much bigger than brown planthopper in the field. There were two occurrence peaks in late June and late July respectively. As white-backed planthopper is an importance of the media of rice black-streaked dwarf virus, it leads in a large area of this disease. In different rice varieties, Zhong you 288, T You 272, Ⅱ 117, Yi S wan no.2, Hua Liang you 4480, etc. were easily susceptible and the incidence rate of them above 50%, whereas that of Yue you 9113 at ≤ 5%, and more resistant.