Effect of some lichen extracts from Sri Lanka on larvae of Aedes aegypti and the fungus Cladosporium cladosporioides

Abstract

Dichloromethane and methanol extracts of 48 lichens collected from six areas in Sri Lanka were subjected to mosquitolarvicidal assay against the second instar larvae of Aedes aegypti and antifungal assay against Cladosporium cladosporioides. The following extracts showed significant mosquitolarvicidal activity. CH2Cl2.: Cladonia coniocraea, Everniastrum sp.,Parmelina tiliaceae, Parmotrema chinense, Parmotrema tinetorum, Rimelia reticulata, Dirinaria applanta, Heterodermia leucomelos, Roccella montagnei, Stereocaulon sp., Ocellularia sp., two species of Myriotrema, and Usnea sp. MeOH: Hypogymnia sp., H. leucomelos, Lepraria atrotomentosa. The CH 2Cl2 extracts of C. coniocraea, Hypogymnia sp., Lecanora sp., Parmeliella sp., Everniastrum sp., Heterodermia diademata, H. leucomelos, R. montagnei, and Usnea sp., exhibited potent antifungal activity.