稻粒黑粉病病穗率与病粒率的关系及其分级标准研究  

A STUDY ON THE RELATIONSHIP BETWEEN DISEASED RANICLE RATE AND DISEASED SEED RATE OF RICE KERNAL SMUT AND STANDARDS FOR ITS GRADING

作　　者：黄富[1] 潘学贤[1] 程开禄[1] 汪远宏[1] 张长伟[1] 

机构地区：[1]四川省农科院水稻高粱研究所

出　　处：《西南农业大学学报（自然科学版）》1994年第1期32-34,共3页Journal of Southwest Agricultural University

摘　　要：利用田间调查的数据，分析了稻粒黑粉病病穗率与病粒率的关系和发生程度的分级标准。结果表明，病穗率与病粒率的关系以指数函数拟合较好；在病穗率小于８０％左右时可以用直线方程拟合。病害发生程度可分为５级。Based on the data collected in a field investigation,the relationship between diseased paniclerate and diseased seed rate(P-S relationship)of rice kernel smut(Neovossia horrida)was analyzedand the standards for grading its incidence were established.The P S relationship may well bedescribed with an exponential function.It may also be described with a linear function when thediseased panicle rate is below 80%.The incidence of the disease is divided into five grades.

关 键 词：稻粒黑粉病 病穗率 分级 杂交水稻 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]