ESTIMATION OF POPULATION AND EVALUATION OF RHIZOSPHERE MYCOFLORA AND FLUORESCENT PSEUDOMONADS AGAINST Rhizoctonia solani UNDER IN VITRO CONDITION
Journal Title: International Journal of Microbiology Research - Year 2017, Vol 9, Issue 2
Abstract
Tomato crop is attacked by several soil borne fungal pathogens among which Rhizoctonia solani is the most important soil borne pathogen causing symptoms of damping off, crown rot and root rot. To provide bio-efficacy against casual agent, the population of rhizosphere mycoflora and fluorescent pseudomonads was estimated from the soil samples collected from diseased, healthy and luxuriously growing weed plants as colony forming units (cfu) on different culture media and were tested for their antagonistic potential against R. solani under in vitro condition. Among the sources of rhizosphere soil collected, significantly highest mean cfu count of mycoflora (27.70) and fluorescent pseudomonads (40.75) was observed in case of samples collected from weed plants followed by healthy tomato plants. Among the mycoflora, the isolate M10 was found to be the potential antagonist and was identified as Trichoderma viride, whereas the effective pseudomonad isolate P1 was identified as Pseudomonas fluorescens.
Authors and Affiliations
N. SUMALATHA
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