الفهرس 
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Abstract
The present investigation concerned the soft rot of solanaceous plants which is consider one of the most destructive diseases.
Seven isolates of soft rot bacteria were secured from naturally infected pepper fruits, potato tubers and stems and turnip roots. Identification studies as well as pathogenicity test revealed that five isolates (3 from pepper,1 from stem of potato and 1 from turnip robts) were classified as E. carotovora subsp. carotovora, whereas two isolates from potato tubers were sorted as E. carotovora subsp. atrosceptica. Pepper isolates ( EPl’ EP2 and EP3) were the most virulent for all tested host tissues (pepper, potato, cucumber and squash fruits); isolates Et (from turnip roots), Epo2’ Epol (from potato tubers), and Ea ( type isolate) came, in the order named, next to the pepper isolates. The last four isolates appeared .as active rotters, but considerably less virulent than first three ones.
Erwinia carotovora subsp. atroseptica isolates caused blackleg symptoms on seedlings of the Alpha potato cultivar whereas, E. Carotovora subsp. Cartovora isolates did not.Moreover, turnip isolate (Et) of the subsp. carotovora was more aggressive causing wilt followed by collapse and
And death of potato seedlings.