| Dravya-A Putative Organic Treatment Against Alternaria padwickii Infection inPaddy |
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S. G. Sathyanarayana, S. Lokesh, T. Vasanth Kumar, H. S. Shetty |
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| Abstract |
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Innate defence mechanism in plants can be triggered and enhanced by certain agents, referred as inducers against broad range of pathogens. In the present study, Dravya (a sea weed extract) was highly compatible with commonly available synthetic fungicides, Bavistin and Dithane M-45. Incidence of Alternaria padwickii and Bipolaris oryzae was also reduced to a greater extent in the paddy seed samples in Dravya treatment. Dravya also enhanced the seed germination and seedling vigour. Seedlings of treated samples also showed enhanced activity of peroxidase upon challenge inoculation with Alternaria padwickii. The enzyme activity was two fold high after the inoculation of pathogen. The suppression in disease incidence in growing plants indicated the promising effect of Dravya and Dithane M-45 under green-house condition. |
| Key Words:
Alternaria padwickii, disease suppression, Dravya, weed extract |
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