大豆根腐病主要病原菌对大豆幼苗致病性的初步研究  

A PRELIMINARY STUDY ON THE PATHOGENICITY OF THE MAIN PATHOGENS CAUSING SOYBEAN SEEDLING ROOT ROT

作　　者：韩庆新[1] 辛惠普[2] 

机构地区：[1]黑龙江省农业科学院植保所 [2]黑龙江八一农垦大学

出　　处：《大豆科学》1990年第2期157-162,共6页Soybean Science

摘　　要：大豆根腐病系由多种土传病原菌复合侵染所致,本试验在前人的基础上进一步明确了Fusarium oxysporum以及Rhizoctonia. solani对大豆幼苗具有较强的致病能力,其中又以Fusarium oxysporum占明显优势,是黑龙江省大豆根腐病发生的主要致病病原菌,温暖和土壤稍干燥的条件下有利于该病原菌的使染和危害。Soybean root rot is widely distributed in Heilongjiang province, and is one of the most serious disease effecting soybean production in this area. The disease is caused by pathogen complex, so for Fusartum sp, Rhizoctonir sp and pythium have been isolated from the root rot plants. The study of the determination of the pathogenicity of the isolates of F. oxysporum and R. solani, and the in vestigation of the incadence after the application of selective fungicide were undertaken. The re suits showed that F. oxysporum and R, solam had strong pathogenicity to soybean. F.. oxysporum was superior to R. solant in causing the disease, and it might be the main pathogen causing the soybean root rot in Heilongjiang province. The pathogens also have the stronger pathogenicity to soybean under the condition of warm and slightly dry soil.

关 键 词：大豆 根腐病 病原菌 幼苗 致病性 

分 类 号：S435.651[农业科学—农业昆虫与害虫防治]