الفهرس 
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Abstract
Legume Crops have a prominent importance in Egypt and other countries. They cover most needs of vegetable proteins for the majority of the people in A. R. E.
According to the statistical data of the Ministry of Agriculture in A. R. E. (1992), the area cultivated with faba bean amounted to 390,044 feddans, yielded about 1,387,136 ardab.
Faba bean plants ( Viciafaba L.) are attacked by many soil fungi which cause damping-off and root-rot significant reduction in yield of such crops occurs aainually especially in some heavy-infested soils without good drainage.
Vesicular-arbuscular mycorrhizae (VAM) fungi form a symbiotic relationship with their host by colonizing the control region of feeder roots both inter-and intracellularly. They benefit the host plant primarily by increasing the capability of the root system to absorb and translocate phosphorus (P) and micro elements through a extensive network of hyphae external to the root. The near ubiquitous occurrence of VA-Mycorrhizal fungi in roots of Agricultural crops and their obligate dependence on the host have resulted in a common association with plant-parasitic nematodes and root-infecting fungi. In fact, concomitant infections of yAM-fungi and pathogens in host roots are the rule rather than the exception.
Diseases caused by soil-borne fungi can be influenced by the formation of VA-Mycorrhizae in the root system. In general, mycorrhizal plants suffer less damage and the incidence of disease is decreased or pathogen development is inhibited (Dehne, 1982). However, some reports indicate an increase in disease severity under the influence of VA-Mycorrhizal fungi (Davis and Menge,1980; Davis et aL,1978 and Ross, 1972).