稻曲病产量损失测定及调查测报因子研究  

Rice yield loss caused by Ustilaginoidea virens and the factors for investigation and forecasting

作　　者：刘年喜[1] 王金辉[1] 刘二明[2] 李小娟[2] 郑和斌[1] 

机构地区：[1]湖南省植保植检站,长沙410005 [2]湖南农业大学生物安全科学技术学院,长沙410128

出　　处：《植物保护》2010年第4期145-147,共3页Plant Protection

基　　金：湖南省科技重大专项(05NK1005)

摘　　要：稻曲病是水稻穗部的重要真菌性病害。本研究分析了13个供试水稻品种每穗稻曲病病粒数与水稻产量损失的线性关系,根据每个品种线性方程及南方稻区实际情况,得出了田间稻曲病经济允许水平、成灾因子,即平均每穗病粒数分别为0.57、5.44粒。Rice false smut caused by Ustilaginoidea virens is an important panicle fungus disease on rice. The linear relationships between the average diseased grains per panicle and the yield loss of 13 rice cultivars were studied. Based on these linear relationships, combined with the linear equation with the practical situation in the rice production areas in South China, we established the factors of economic threshold, epidemics of rice false smut. The average diseased grains per panicle were 0. 57 and 5.44, respectively.

关 键 词：稻曲病 产量损失 线性方程 测报因子 

分 类 号：S435.111.46[农业科学—农业昆虫与害虫防治]