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Role of some soil bacteria and actinomycetes in controlling cucumber root-rot disease [electronic resource].

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Swelim, M. A

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Language: English Summary language: Arabic Description: P. 217-228Other title:

دور بعض بكتريا واكتينومايسيتات التربة فى مقاومة المسبب المرضى لمرض تعفن الجذور فى نبات الخيار [Added title page title]

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Egyptian journal of microbiology, 2003 v.38 (3) [electronic resource].

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In: Egyptian Journal of Microbiology 2003.V.38(3)Summary: Twenty five isolates of Nz-fixing bacteria and eleven actinomycetes were chosen from 117 microorganisms isolated from desert soils and different plant roots to study their effect on Rhizoctonia so/ani, the causative of the root-rot disease. The data revealed that Azotobacter Rfand Azospirillum Kc were the most active for nitrogen fixation (210 and 133 ppm), root colonization (61.3% and 65%) and antagonistic effect on the pathogenic fungus R. solani (15 and 17 mm). The two strains were identified as Azotobacter chroococcum and Azospirillium lipoferum. The actinomycetes isolate, Streptomyces Ncu was the most active strain for root colonization ability (41.4%) and antagonistic effect against R. solani (22 mm). This strain was completely identified as Streptomyces lydicus.

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Twenty five isolates of Nz-fixing bacteria and eleven actinomycetes were chosen from 117 microorganisms isolated from desert soils and different plant roots to study their effect on Rhizoctonia so/ani, the causative of the root-rot disease. The data revealed that Azotobacter Rfand Azospirillum Kc were the most active for nitrogen fixation (210 and 133 ppm), root colonization (61.3% and 65%) and antagonistic effect on the pathogenic fungus R. solani (15 and 17 mm). The two strains were identified as Azotobacter chroococcum and Azospirillium lipoferum. The actinomycetes isolate, Streptomyces Ncu was the most active strain for root colonization ability (41.4%) and antagonistic effect against R. solani (22 mm). This strain was completely identified as Streptomyces lydicus.

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