Plants and Plant Extracts
The plant leaves of peach L. (Rosales: Rosacese), Eucalyptus (Myrtales: Myrtaceae), Ashok ( ), Sow thistle (Asterales: Asteraceae) and Milk thistle (Asterales: Asteraceae) were collected from National Agricultural Research Centre, Islamabad, field area and placed on paper for drying under shade. Completely dried leaves were grinded to fine powder. Later on 50 g of each plant's powder was soaked separately in 100ml of acetone, ethanol and petroleum ether for 4 days and were stirred 2-3 times daily. After four days they were filtered with filter paper (Whatman No. 1). The filtered plant extracts were concentrated on rotary evaporator (Rotavapor R-IIA Buchi, Switzerland) and finally made solvent free in a vacuum desiccator.