Effect of potential bioinoculants and organic manures on root‐rot and wilt,growth, yield and quality of organically grown Coleus forskohlii in a semiarid tropical region of Bangalore (India) |
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| Authors: | R Singh A Kalra B S Ravish S Divya T N Parameswaran K V N S Srinivas D J Bagyaraj |
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| Institution: | 1. Central Institute of Medicinal and Aromatic Plants (Council of Scientific & Industrial Research), PO CIMAP, Lucknow 226015;2. Central Institute of Medicinal and Aromatic Plants, Research Centre (Council of Scientific & Industrial Research), Allalasandra, Bangalore 560065;3. Central Institute of Medicinal and Aromatic Plants, Research Centre (Council of Scientific & Industrial Research), Boduppal, Hyderabad;4. Centre for Natural Biological Resources and Community Development, 41, RBI Colony, Anandnagar, Bangalore 560024, India |
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| Abstract: | Based on earlier results obtained in pot experiments, 2‐year field experiments were conducted with five bioinoculants and neem cake under organic field conditions (with vermicompost as a nutritional supplement) to evaluate their potential to control root‐rot and wilt (a complex problem involving Fusarium chlamydosporum and Ralstonia solanacearum) of the medicinal plant Coleus forskohlii. Plants treated with arbuscular mycorrhizal fungus (Glomus fasciculatum), neem cake or Pseudomonas fluorescens showed significantly increased plant height (15–31%), plant spread (25–33%), number of branches (63–67%) and dry root (129–200%) yields, and reduced disease incidence (47–50%) compared to controls. Increases in yields were reflected by increases in N (51–81%), P (17–76%) and K (44–74%) uptake. The forskolin content of the roots was found not to be affected by any of the bioinoculants, but forskolin yield (calculated) was increased significantly by treatment with G. fasciculatum (227%), neem cake (222%) or P. fluorescens (159%). |
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| Keywords: | Fusarium chlamydosporum organic cultivation organic fertilizers Ralstonia solanacearum root‐rot/wilt |
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