Bioefficacy of Lecanoric Acid Produced by Parmotrema austrosinense (Zahlbr.) Hale against Tea Fungal Pathogens

Lichens are symbiotic organisms that composed of fungal partners and photosynthetic algal partners. During the process in lichen thallus, fungus synthesizes certain secondary metabolites which lecanoric acid is very important terms antibiotic properties. Considering vital importance acid, present study aimed to produce from thallus Parmotrema austrosinense using Modified Bold’s basal salt medium evaluate bio-efficacy against tea pathogens. Lecanoric was purified confirmed by micro-crystallization method subsequently bioassayed The results revealed registered a significant antifungal activity growth inhibition test Companion systemic botanical fungicides were found be inferior percentage inhibition. rate varied among Of pathogens tested, leaf disease-causing including Cercospora theae (C. theae), Glomerella cingulata (G. cingulate), Phomopsis (P. theae) showed highest followed stem root rot diseases. suggests an inhibitory effect pathogens, might due properties fungicidal action acid.