Department of Plant Pathology, CSKHPKV, Palampur-176062
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
A numbers of plants are used as antimicrobial agent. Antimicrobial activities of these plants are due to their alkaloids, natural phenols, steroids, terpenes and related compounds. To evaluate various phytoextratcs against Neovossia indica under in vitro conditions. Leaves and rhizomes (powder) of various plants namely Curcuma longa, Ageratum conyzoids, Calotropis procera, Eucalyptus globules, Eupatorium adenophorum and Lantana camara were collected and extracted in sterilized water. The aqueous extracts of different concentrations (25, 50, 75 and 100%) were tested for inhibitory activity on mycelial growth and teliospore germination of N. indica. All the extracts of plants showed complete inhibition of mycelia growth of pathogen at 100 per cent concentration. However, maximum inhibition was observed in L. camara (94.24%), E. globules (93.42%) and C. procera (91.77%). E. adenophorum, A. conyzoids and C. longa resulted in 91.56, 91.56 and 91.36 per cent inhibition of mycelial growth, respectively at 75 per cent concentration. All the botanicals were equally effective as they did not show any significant difference in their efficacy. Aqueous extracts of L. camara, E. globulus, E. adenophorum and C. procera resulted in complete inhibition of teliospore germination of pathogen at 75 per cent concentration. C. longa and A. conyzoids gave 91.82 and 90.70 per cent inhibition, respectively at same concentration.
