Pluchea lanceolata (DC.) C.B. Clarke (Asteraceae) is a rapidly spreading perennial dicot weed in semiarid areas of north-west India [12]. Allelochemicals are released into the environment through leaching from living plant parts, root exudates, volatilization, residue decomposition, microbial activity, and agricultural practices such as plowing of plant residues into the soil [1] [11]. To explore allelopathic potential of P. lanceolata on vegetable crop we examined the effect of aqueous extract of shoots of this plant on seed germination of okra and radish
