Evaluation of antifungal activities of Xerophytes against plant pathogenic fungi considering their radial mycelial growth inhibition at different concentrations


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Bangladesh is the land of many indigenous herbal medicinal plants. These plants have the
potential for antimicrobial activities because of having a wide variety of secondary metabolites.
Extracts of leaves of four selected xeric plants were taken to evaluate the antifungal activities
against plant pathogenic organisms considering their radial mycelial growth inhibition at
different concentrations. Extracts of the selected xerophyte plants (Vacuellia nilotica, Calotropis
gigantea, Ziziphus mauritiana and Cassia fistula) with different concentrations were found
effective against tested three Phytopathogens like Bipolaris sorokiniana, Bipolaris oryzae and
Alternaria padwicki. This experiment was conducted following CRD method with five replications.
The inhibitory performances of xerophytes were higher at 25 % concentration against all tested
Phytopathogens. Calotropis gigantea showed a significant (P<0.01) effect on radial mycelial
growth of Bipolaris sorokiniana and Alternaria padwicki at all concentrations, but there was no
significant effect on Bipolaris oryzae. Cassia fistula showed a momentous effect on radial mycelial
growth at all concentrations, but a maximum inhibitory effect was observed in Bipolaris oryzae at
25% concentration. The inhibitory performance of Ziziphus mauritiana and Vacellia nilotica was
higher on Bipolaris sorokiniana than the other tested phytopathogens. The inhibition percentage
was increased with the concentrations of different xerophytic leaf extracts.

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