ASSESSMENT OF DIFFERENT BRASSICA GERMPLASMS AGAINST ALTERNARIABLIGHT AND ITS MANAGEMENT USING NATURALLY OCCURRING CHEMICALS

In the present study, sixteen advance lines/cultivars of Brssicanapus and Brassica juncea were screened out against Alternaria blight of brassica (Alternariabrassicae). Out of eight lines/cultivars of B.napus, no line was found to immune against A.brassicae. Legend, Oscar, and Dgl were moderately resistant under field conditions and Shiralee was highly susceptible toA. blight. Similarly in B.juncea, no line was observed immune; Khanpurrya, Ryaanmol, AUB 99 and SM 8300 were moderately resistant and B527-1 was highly susceptible to A. blight. In this study, three different plant extracts (Ginger, Garlic and Turmeric) with 0.1%, 0.2% and 0.3% concentrations were evaluated against A. blight. The disease severity for all the plant extracts varied significantly at three different concentrations. Among these plant extracts, Turmeric (Curcuma longa) with 0.3% concentration gave significant result regarding disease intensity (12.74%) over control (26.86%). Similarly, these plant extracts with different concentrations were used to check their efficacy on yield (kg/ha) parameter. Turmeric with 0.3% concentration gave the satisfactory result to increase the yield (1545.33 kg/ha) as compare to untreated control (1086 kg/ha).