我们一向把真菌分为两个大的生理群:一群为腐生真菌;一群为寄生真菌。寄生真菌中,当然,最引人注意,而且研究最深的是那些致病的寄生真菌,这也是植物病理学主要的研究对象,但在自然界中,确实存在着更多种类的寄生真菌,它们在寄主体上营寄生生活,对寄主植物并无显著危害作用。对这些种类繁多、并无显著危害作用的寄生 We have always divided fungi into two large physiological groups: a group of saprophytic fungi; a group of parasitic fungi. Parasitic fungi, of course, are the most notable ones, and the ones most studied are those pathogenic parasitic fungi, which are also the main targets of plant pathology, but in nature there are a greater variety of parasitic fungi that exist Host parasitic parasitic life on host plants did not significantly harm. For these kinds of parasites, there is no significant hazard