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Articles by S. Lokesh
Total Records ( 3 ) for S. Lokesh
  S.G. Sathyanarayana , S. Lokesh , T. Vasanth Kumar and H.S. Shetty
  In order to trigger defense mechanisms in plants, abiotic or biotic factors can be used as inducers/elicitors. In the present study, Dravya (a sea weed extract) was evaluated for its compatibility with common synthetic fungicides like Bavistin and Dithane M-45. Dravya was found to be highly compatible with Dithane M-45, in which the incidence of Bipolaris oryzae and Alternaria padwickii was reduced to a greater extent in the paddy seed sample of Cv. IR-64, a popular variety for popped rice in South India. In parallel, seed germination and seedling vigour were also enhanced over control. Treated seedlings also indicated the enhanced peroxidase and phenylalanine ammonia-lyase activities upon challenge inoculation with Bipolaris oryzae. Challenged seedlings showed higher activity of enzymes on second and fourth day after inoculation. The suppression in disease incidence of the seedlings was also noticed in the growing plants indicated the promising effects of Dravya with Dithane M-45 under green house conditions.
  B.G. Bharath , S. Lokesh , B. Yashovarma , H.S. Prakash and H.S. Shetty
  Not Available
  B.G. Bharath , S. Lokesh , H.S. Prakash and H.S. Shetty
  In the present study, chemicals and antagonists were used for their efficacy in the management of seed-borne fungal pathogens of watermelon. The fungal species belonging to different genera were isolated from the seeds of watermelon and were used to assess their vulnerability to an array of chemicals and bio-agents. Among the fungal pathogens, Fusarium species was effectively suppressed due to Bavistin. Topsin also gave the promising results against all the fungal pathogens. Whereas, Dithane M-45 effectively controlled Didymella bryoniae. Seed treatment with antagonists like Trichoderma harzianum and T. viride improved the seed germination, seedling vigour and reduced the incidence of seed-borne fungal pathogens compared to control. Bavistin and Topsin among chemicals, T. harzianum among bio-agents increased the seed germination and vigour index significantly. Trichoderma harzianum showed its efficacy against all Fusarium species and even stood more effective than Captan and Blitox. However, Pseudomonas fluorescens also showed promising effect against Didymella bryoniae over fungicides.
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