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Abstract
Results obtained from this investigation could be summarized
as follows:
I-Six fungal species associated with damping-off and root rot
of tomato plants were isolated and identified as Fusarium
solani (Burk) Synder &Hansen, Rhizoctonia solani (Kuehn),
Fusarium oxysporum (Schechtend), Sclerotium rolfsii
(Saccarde), Pythium ultimum (Trow) and Phytophthora sp.
2- Frequency of the fungi isolated from infected tomato roots
showed that F solani was the most prevailing fungus followed
by R. solani andFoxysporum.On the contrary, Sclerotium
rolfsii, Pythium ultimum and Phytophthora sp. were the least
frequent.
3-Pathogenicity tests on Super marmande tomato cultivar
under greenhouse conditions revealed that all tested fungi were
pathogenic causing damping-off and root rots. Fusarium
solani and Rhizoctonia solani were the more pathogens
exhibited severe root rots, whereas, S. rolfsii, P. ultimum,
Phytophthora sp. and F oxysporum were less virulent.