两系杂交稻稻曲病发生规律及防治  

Occurrence and Chemical Control of False Smut of Two-Line System Hybrid Rice Infected by Ustilaginoidea Virens

作　　者：谢炜[1] 唐春生 刘新民 高家樟 黄守行 罗学义[1] 曹国平 肖青 张益民 

机构地区：[1]湖南省衡南县农业局植保站,湖南衡南421001 [2]湖南省衡阳市农业局,湖南衡阳421001 [3]湖南省祁东县农业局植保站,湖南祁东421600

出　　处：《湖南农业大学学报（自然科学版）》2002年第2期106-108,共3页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省衡阳市科委重点科技攻关项目 (96 - 7)

摘　　要：为控制日益严重的两系杂交稻稻曲病的危害 ,分别对不同杂交组合按新分级标准系统调查田间病情 ,并进行多种田间小区药剂试验和综防示范 ,探讨两系杂交稻稻曲病的发生规律及防治措施 .结果表明 ,两系杂交稻稻曲病的发生与组合的抗性密切相关 ,稻曲病的田间发生规律可用逻辑斯蒂曲线模型拟合 .防治稻曲病的药剂以瘟曲克星的防效最好 ;防治适期足水稻孕穗末期至破口期 ;对感病组合药剂防治施药两次比施药一次效果好 ;以推广抗病组合为基础的综合防治措施切实可行 。The results obtained from experiments show that occurrence of false smut of two line system hybrid rice (except resistant crosses) in the fields can be simulated with logistic equation and are closely related with resistance of crosses. Optimum control period of false smut is from the end of boot stage to the rupturing stage of rice. Twice spraying are suitable for susceptibility or more susceptibility crosses. Besides the suiting drugs for rice false smut are selected: Wenqukexing ,Sanzuotong, Laoantong,etc. Wenqukexing is the best drug among them.

关 键 词：发生规律 两系杂交稻 稻曲病 逻辑斯蒂方程 防治 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]