Efficacy of starner in controlling the bacterial soft rot pathogen in onion [electronic resource].

Includes references.

Five isolates of soft rot pathogen (Erwinia earotovora subsp. earotovora) isolated from rotted onion bulbs collected from stored onions in fium area during August 2002 at Giza governorate, Egypt. Bacterial isolates were identified according to pathological, morphological, cultural, physiological and biochemical characteristics. The obtained isolates has been differed in their ability to produce acid from sugars. Pathogenicity test showed that E. earotovora subsp. carotovora isolates also cause different degrees of soft rot symptoms on inoculated whole bulbs and/or slices of onion. The inhibitory effect, of bactericides Starner (oxolinic acid) and streptomycin sulphate against the growth of E. earotovara subsp. earotavora isolates in vitro, showed that Starner was more effective in suppression the growth of bacterial isolates comparing with streptomycin. Bacterial isolates were sensitive to Starner at concentrations from 25 to 150 ppm.

Summary in Arabic.

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