Comparative evaluation of commercial formulations Nutri-Neem and Rifol on downy mildew disease of pearl millet
Journal Title: International Journal of Life Science - Year 2018, Vol 6, Issue 4
Abstract
Pearl millet, Pennisetum glaucum (L.) R. Br., is an important dietary food crop with an annual production of 8.01 million tonnes in India. The crop yield is jeopardized by downy mildew pathogen Sclerospora graminicola(Sacc.) Schroet causing huge monetary losses. Durable, sustainable ecofriendly approach has become important for management of downy mildew disease in pearl millet in current years. In this study, two commercial SAR formulations i.e., Nutri-Neem (neem oil) and Rifol (combination of fish oil and mineral oil) were evaluated for their growth promoting nature and for their potential to elicit resistance against downy mildew in pearl millet plant. Seed treatment with Nutri-neem recorded maximum seed germination and seedling vigor compared to the Rifol and distilled water control. Under greenhouse conditions 3% Nutri-neem and 7% Rifol as seed treatment recorded 58 and 62 % downy mildew protection respectively which was significantly higher than that of the formulations applied as foliar spray. However, combination of seed treatment and foliar spray showed 75 and 66% downy mildew protection with Rifol and Nutri-neem respectively. Similar downy mildew protection activity was also observed under field conditons for both Rifol and Nutri-neem. The nature of downy mildew protection offered by both Rifol and Nutri-neem was found to be systemic and durable as demonstrated by the spatio-temporal studies. Both Nutri-neem oil and Rifol formulations significantly enhanced the vegetative and reproductive growth parameters of the pearl millet plants compared to the untreated controls. The present study demonstrated that Nutri-neem and Rifol can be applied as growth promoting and resistance inducing formulations for plant disease management in general, and for pearl millet downy mildew in particular.
Authors and Affiliations
Chandrashekhar a, SN Lavanya,, M Umashankara, S Niranjan-Raj
Keywords
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