National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Rhizoctonia solani is an ubiquitous soil borne plant pathogen causes versatile diseases in agricultural crops. Due to the attack of the pathogen, plant show symptom like damping off, wire stem, stem rot, collar rot, web blight, charcoal rot, black scurf, sheath blight and banded leaf and sheath blight etc in different host crops. In the present study we isolated different isolates of R. solani from different host plant of different locations. The association of pathogenic isolates was confirmed by Koch postulate which was conducted on hypocotyl by mixing the soil with culture having R. solani and seeds were sown for germination. Fifteen days after the germination of seeds, seedlings showed symptoms, whereas controlled seedlings remained healthy. Further, pathogenicity test was also conducted on leaves by inoculating freshly cultured mycelial disc (5 mm) on healthy plants of different hosts, non-inoculated plants served as control. Few inoculated plants developed symptoms, whereas controlled plants remained healthy. We also evaluated cross infectivity of different isolates in different crops plant through standard method and found that isolates of rice (RS-1 and RS-2) and setaria (RS-4) causes infection to all the tested host plants like maize, green gram, cabbage and potato being highest score 5. But few isolates of R. solani, RS-3, RS-5, RS-5, RS-7, RS-8, RS-9, RS-10 could not cause infection to all the host plant tested except few. Long pepper (RS-6) could not cause any infection on maize and green gram and showed score 0.
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