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甜菜根腐病是一种土传病害,系由多种病原菌所引致,其中病原真菌多为兼性寄生菌,往往当一种病原侵染以后,其它腐生菌又随之侵入,成为混合侵染,即“一些寄生真菌所引起的伤害可使病组织迅速被侵,而次生微生物几乎代替了初生寄生物,以至分离初生寄生物成为纯培养的工作极为困难”(Stephen Wilhelm)在这种情况下,欲明确根腐病的主要致病菌,是比较困难的,必须进行大量的微生物分离、培养、接种和病原菌鉴定等工作。
Beet root rot is a soil-borne disease caused by a variety of pathogens, of which the pathogenic fungi are mostly facultative parasites, often when a pathogen infection, followed by the invasion of other saprophytic bacteria, a mixed infection , That “damage caused by some parasitic fungi causes rapid swallowing of the diseased tissue, and secondary microbes almost replace primary parasites, making it even more difficult to separate primary parasites into pure cultures” (Stephen Wilhelm) In this case In order to clarify the main pathogens of root rot, it is difficult to carry out a large number of microbial isolation, culture, inoculation and identification of pathogenic bacteria.