الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Plants are regularly attacked by pathogens harmful to plant health yield and capable of triggering an arrangement of local and systemic responses. Soil- borne plant pathogens are microorganisms that cause plant infections by inoculum which goes to the plant via the soil. The most recognizable disease brought about by soil borne pathogens are likely rots that affect below ground tissues as seed decay, root and crown rots, and vascular wilts started through root contaminations. Whereas a few soil-borne pathogens cause foliar diseases with indications and harm seeming on above ground portions of plants. Seed-borne pathogens have significant influence on seed production and food industry. Tomato is one of the most vital vegetable crops grown around the world. It is an important dietary component contributing in the improved nutrition and livelihood for rural and urban population. In Egypt, tomato farming covers about 32% of the whole vegetable-growing area; with whole production being approximately 16% of total vegetable production. However, tomato is subjected to attack by different seed- and soil-borne fungal pathogens, which have an important influence on crop production leading to sever economic based damages. Much attention has been focused on the pathogens that could attack this crop especially Fusarium oxysporum and Pythium debaryanum, wilt and root rot diseases-causing, respectively. Repeated attempts to control these diseases by soil disinfestation and use of chemicals have been failed. Large amounts of fertilizers used in crop production are lost to the environment and cannot be utilized by plants, causing not only environmental pollution, but also economic.