Efficacy of bioformulations and fungicides to control Linseed Blight

The bioformulation of Trichoderma harzianum @ 4g/kg seed and T. viride @4g/kg seed controlled the blight due to both the pathogens to cent per cent level whereas Mycelia sterila @10g/kg seed and 10⁹ CFU ml⁻¹Pseudomonas fluorescens were able to control 89% and 98% blight caused by A. lini and 100% by A. linicola, respectively. Nigrospora sphaerica could control 73% and 79% blight infestations by A. lini and A. linicola, sequentially. Foliar sprays controlled cent per cent blight infestations of A. linicola by 1% T. harzianum, 1% T. viride, 0.5% each Trichoderma in mixture and 10⁹ CFU ml⁻¹P. fluorescens. A. lini blight was controlled up to 98% and 93% by Mycelia sterila and P. fluorescens. Mixture of T. harzianum (0.5%) and T. viride (0.5%) was able to control 87% blight infection of A. lini. Nigrospora sphaerica proved less effective in foliar sprays. Fungicidal control of A. lini and A. linicola was experimented using fungicides viz. carbendazim, copper oxychloride, triphenyltin hydroxide, mancozeb, oxycarboxin, carboxin and zineb. Mancozeb (0.2%) was the best fungicide for both the pathogen and could control 88.3% blight caused by A. lini and 100% by A. linicola while oxycarboxin was least effective for A. lini (22.6%) and triphenyltin hydroxide for A. linicola (41.6%).