Abstract
The methanolic and dichloromethane of three medicinal plants viz., Pterocarya fraxinifolia, (Juglandaceae), Ilex spinigera
(Aquifoliaceae), Pyrus boissieriana (Rosaceae), were tested for their antibacterial activity against Bacillus subtilis, antifungal activity
against Candida albicans and Cladosporium cucumericum, as well as for their larvicidal activity against Aedes aegypti. A
bioautographic assay on TLC plates has been used for this screening. The methanolic extract of P. fraxinifolia was found to be the
most effective extract against C. cucumericum, C. albicans and Bacillus subtilis. Two fractions of the P. fraxinifolia were the major
constituents for these activities. Both fractions had naphtoquinone structure.
