Abstract
The efficacy of aqueous leaf extracts of three Plumbago (Plumbago indica, P. capensis, P. zeylanica) species on anthracnose fungus Colletotrichum gloeosporioides were assessed. Out of the extract of three plants screened, that of Plumbago indica showed the best result both in inhibition of conidial germination up to (98.9%), and radial mycelial growth (98.75%) of the pathogen over the control and in the pectinolytic enzyme studies also P. indica showed a minimum activity of Polymethyl esterase (1.91U), Polymethyl galacturonase (endo PMG-2.77%; exo PMG-0.028U) and Pectin trans eliminate; the least amount of sugar (endo PTE-17.14%; exo PTE-11.11U) was released in P. indica. In cellulolytic enzyme studies, the amount of viscosity loss due to the activity of 1,4-β endoglucanase was remarkably reduced (3.57%) in P. indica compared to the other two species. P. capensis showed moderate results; P. zeylanica showed minimum inhibition of the enzyme activity of the pathogen. Results show that among all three plumbago species tested, Plumbago indica was reported to be an effective plant extract against anthracnose fungus.
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