Abstract:Four species of Vesicular-Arbuscular mycorrhiza fungi, Glomus mosseae (Nicol. and Gerd. ) Gerd.and Trappe, G.hoi Berch and Trappe, G. albidum var. Qianjiang ( Walker and Rhodes ) Wang P. and Z. M. Q., G.intraradices Schenck and Smith, isolated from cotton