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20111
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Subject: Plant Pathology × Author: Ahamed Mujtaba V. × End date: 2018 × Start date: 2010 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Studies on Production of Oil Based Formulation of Trichoderma and Their Efficacy of Foliar Diseases of Groundnut
    (UAS, Dharwad, 2011) Ahamed Mujtaba V.; Shripad Kulkarni
    Isolation of Trichoderma harzianum, maintenance of pure culture, mass production and preparation of oil based formulations were carried out at Institute of Organic Farming and field experiments and studies on shelf life and field evaluation of different oil based formulation against rust and late leaf spot of groundnut were carried out during kharif 2010 at MARS, University of Agricultural Sciences, Dharwad, Karnataka. Among the several diseases affecting the groundnut crop, foliar disease cause heavy loss in yield. These include late leaf spot [Phaeoisariopsis personata (Berk. and Curt.) V. Arx] and rust (Puccinia arachidis Speg.). Results of in-vitro studies of present investigation on shelf life reveals that among various oil based formulations Canola oil + Glycerol based formulation (3.00 x 106 cfu/ml) was found to be the best formulation with highest shelf life, followed by Paraffin oil based formulation (2.00 x 106 cfu/ml). In in-vitro evaluation of different Trichoderma oil based formulations against pathogenic propagules of rust and late leaf spot causing fungi indicated Paraffin oil + Neem oil based formulations to be superior with 4.79% and 3.67% uredospore germination and conidial germination, respectively followed by Neem oil based formulation with 5.68% and 4.59% germination against 92.27% and 95.60% uredospore and conidial germination in control. Among different oil based formulations tested for the management of both rust and late leaf spot, Canola oil + Glycerol based formulation was found to be most effective in reducing the incidence of both rust and late leaf spot with PDI of 11.70 and 12.64, respectively compared to rust and late leaf spot with PDI of 35.62 and 38.45 in untreated check. Similar trend was also observed with respect to groundnut pod yield, treatment with Canola oil + Glycerol oil based formulation had shown maximum pod yield of 22.22 q per ha.