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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2016 - IJCMAS--ICV 2016: 92.3 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2017) [Effective from January 1, 2017]For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2017)
[Effective from January 1, 2017]
For more details click here

ICV 2016: 92.3
Index Copernicus ICI Journals Master List 2016 - IJCMAS--ICV 2016: 92.3
For more details click here
journals IJCMAS
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Original Research Articles

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 2015: 85.95
NAAS RATING 2017: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(4): 2315-2327
DOI: https://doi.org/10.20546/ijcmas.2017.604.270


Comparative Efficiency of Biocontrol Agents in the Management of Root Borne Diseases of Coleus (Coleus forskohlii (Willd.) Briq.)
A.S. Noor Nawaz1* and K.R. Sreeramulu2
1Department of Agricultural Microbiology, UAS, Dharwad, 580 005, Karnataka, India
2Department of Microbiology, UAS, GKVK, Bangalore-560065, Karnataka, India
*Corresponding author
Abstract:

A field experiment was conducted to score the comparative efficiency of biocontrol agents in the management of root borne diseases of Coleus forskohlii (cv.K-8). The crop has a great potential demand for forskolin (Diterpene) with wide application in treating many human diseases. However, the crop has become unpopular among farmers due to the susceptibility to many diseases of which root rot and wilt is the most serious causing loss in tuber yield and makes the crop uneconomical. The bioinoculants such as Azotobacter chroococcum (N fixer), Bacillus subtilis, Pseudomonas fluorescens, Trichoderma harzianum and Glomus fasciculatum (AM Fungi) were used as potential biocontrol agents in the study. To quantify the disease severity per cent disease index (PDI) was calculated. The least disease incidence with improved plant health and maximum tuber yield was found to be in the treatment of 100% NPK with combined inoculation of all the consortia followed by plants inoculated with same consortia plus 75 % NP with 100% K. The highest disease incidence and least tuber yield were recorded in control plants with 50 % NP plus 100% K without any consortia. This indicates that economically advantageous yields with lowest disease incidence can be obtained with 75 % NP with 100% K and a saving of 25 % N can be achieved by using above consortia. This could be attributed that due to the effective use of microbial biogents with graded level of inorganic fertilizers. Hence, the present study aims at novel approaches to control diseases of Coleus and its economical management.


Keywords: Coleus forskohlii, Forskolin, Biocontrol agents, Root borne diseases, Pseudomonas fluorescens.
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How to cite this article:

Noor Nawaz, A.S., and Sreeramulu, K.R. 2017. To Score Comparative Efficiency of Biocontrol Agents in the Management of Root Borne Diseases of Coleus (Coleus forskohlii (Willd.) Briq.).Int.J.Curr.Microbiol.App.Sci. 6(4): 2315-2327. doi: https://doi.org/10.20546/ijcmas.2017.604.270