BIO-EFFICACY OF TRICHODERMA VIRIDE IN TALC FORMULATION AGAINST SOIL BORNE FUNGAL DISEASES OF FCV TOBACCO NURSERIES IN KARNATAKA LIGHT SOILS

Abstract

Studies were conducted on the bio-efficacy of Trichoderma viride against soil-borne fungal diseases in FCV tobacco nurseries. The experimental results clearly indicated that application of T. viride (2 x 106 cfu/g) @ 20 g/m2 (pre-sowing) + T. viride (1%) drench (at 25 DAS) was on a par with and T. viride (2 x 106 cfu/g) @ 30 g/m2 (pre-sowing) + T. viride (1%) drench (at 25 DAS) in significantly reducing the soil-borne fungal diseases viz., damping-off, blight and black shank in FCV tobacco nursery and in subsequently increasing the total healthy transplants count needed for timely planting. The study resulted in development of a schedule involving application of T. viride (2 x 106 cfu/g) @ 20 g/m2 (i.e) 2.4 kg/unit nursery (120 m2) (pre-sowing) + T. viride (1%) drench (i.e) 1.2 kg/unit nursery (120 m2) at 25 DAS was an ideal level for the effective and eco-friendly management of soilborne fungal diseases such as damping-off, blight and black shank in FCV tobacco nursery.