National Symposium on Strategic Issues in Plant Pathological Research held at Department of Plant Pathology, CSK HP Krishi Vishvavidayalaya, Palampur on November 24–25, 2011
Distillates of five botanicals viz, Ranunculus muricatus, Melia azedarach, Vitex negundo, Eupatorium sp and Murraya koenigii and cow urine were evaluated against seven plant pathogens namely Rhizoctonia solani, Sclerotinia sclerotiorum, Sclerotium rolfsii, Phytophthora nicotianae, Fusarium oxysporum, Fusarium solani and Colletotrichum capsici. Distillates were prepared by hydro distillation method and tested at 0.5, 2.0, 4.0, 6.0, 8.0, and 10.0% concentrations by poisoned food technique in potato dextrose agar medium. M. koenigii and V. negundo provided the complete mycelial growth inhibition of C. capsici, R. solani, P. nicotianae, S. sclerotiorum, F. solani and S. rolfsii at 10% concentration. Inhibition in rest of the concentrations ranged between 85.06 – 98.97%. R. muricatus and M. azedarach caused 100% inhibition of R. solani, S. sclerotiorum and S. rolfsii, where as more than 98% inhibition in mycelial growth of F. solani, P. nicotianae, R. solani and C. capsici was observed at 10% concentration and in other lower concentrations, inhibition was 72.47 – 97.03%. Eupatorium sp. showed 63.05 – 99.69% inhibition against all the test pathogens. Cow urine distillate alone was less effective in comparison to botanical-cow urine distillates which exhibited more than 98% inhibition in mycelial growth of P. nicotianae and S. sclerotiorum and 93% inhibition of C. capsici, R. solani, F. solani, F. oxysporum and S. rolfsii at 10% concentration and inhibition in rest of concentrations was 59.70 – 96.77%.
