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Abstract Cucumber wilt and root-rot diseases are considered the cause of great yield losses in Egypt either in open field or in protected cultivation. Extensive cultivation of susceptible genotypes in the same area in open fields or in greenhouse leads to the increase of the soil borne pathogens particularly the causal organisms, of the above mentioned diseases and due to early onset of epidemic cases. Therefore, in the course of the present study, isolation, purification and identification of the soil borne pathogens were studied. Also, the factors affecting the occurrence frequencies of the dominant pathogens specially the causal organisms of wilt and root-rot were studied. |