Abstract
Surveys were conducted from November 1991 to June 1992 to identify fungi associated with wheat root rot in the Nile Valley, delta region, and new land areas of Egypt. A total of 1,024 fungal isolates were made from diseased roots and crowns of commercially grown spring wheat in Egypt. Thirteen different species were identified. The most frequently isolated fungi were Fusarium culmorum, F. oxysporum, F. solani, Rhizoctonia solani (AG)-4, Macrophomina phaseolina, and Alternaria solani, which represented 168, 134, 66, 221, 193, and 63 of the total number of isolates, respectively. The identification of Gaeumannomyces graminis var. graminis from the new lands is the first report of this pathogen in Egypt. F graminearum, a Helminthcsporium sp., R. solani (AG)-4, and M. phaseolina aggressively rotted roots of the most widely planted spring wheat cultivar, Sakha 69.
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