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ISSN: 2320-964X (Online) 

ISSN: 2320-7817  (Print)



Dr. Santosh Pawar 




Int. Journal of Life Sciences, 2018; 6(4): 957-967     |                 Available online, December 23, 2018

Comparative evaluation of commercial formulations Nutri-Neem and Rifol on downy mildew disease of pearl millet

Chandrashekhara,1 Lavanya, SN,1 Umashankara M2 and Niranjan-Raj S3*


1Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysuru-570006, India.

2Department of Studies in Chemistry, Karnataka State Open University, Mukthagangotri, Mysuru-570006, India.

3Department of Studies in Microbiology, Karnataka State Open University, Mukthagangotri, Mysuru-570006, India.

*Corresponding Author email:


Received: 16.03.2018   | Accepted: 13.12.2018      |   Published: 23.12.2018

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.

Key words : Pearl millet, downy mildew, induced systemic resistance, Nutri-neem oil and Rifol formulation.




Editor: Dr.Arvind Chavhan


Cite this article as:

Chandrashekhara, Lavanya, SN, Umashankara M and Niranjan-Raj S (2018) Comparative evaluation of commercial formulations Nutri-Neem and Rifol on downy mildew disease of pearl millet, Int. J. of. Life Sciences, Volume 6(4): 957-967.


Conflicts of interest: The authors stated that no conflicts of interest.



Copyright: © 2018 | Author(s), This is an open access article under the terms of the Creative Commons Attribution-Non-Commercial - No Derives License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.


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