Survey of vesicular– arbuscular mycorrhizae (VAM) associated with citrus roots in Baghdad city

Abstract

The results of isolation and identification of (VAM) Mycorrhizae with citrus roots in 14 locations around Baghdad city the predomance of Glomus and Gigaspora genus in the most surveyed locations citrus trees , in spite of high frequency appearance of the first genus . The species Glomus mosseae , showed the high frequency occurrence throughout the year tightest occurrence in ( April , May and October ) at ( 27 , 29 and 25 ) spore 5gm soil respectively while the species Gigaspora margarita was the high frequency occurrence species beyond to the genus Gigaspora and recorded highest occurrence in ( April , May and October ) at ( 9 , 10 and 9 ) spore 5gm soil respectively while another species like Glomus fasciculatus , Glomus destriticola and Gigaspora Calospora appeared in low percentages .