effect of methanol and ethanol application on yield of echinacea purpurea l. in karaj region

background & aim: this experiment investigated the effect of foliar application of methanol and ethanol on the biomass yield of medicinal plant echinacea purpurea. purple coneflower is an herbaceous perennial in the asteraceae family that is used in therapy of respiratory tract infection and bacterial otitis. experimental: this experiment was conducted in randomized complete block designed with 15 treatments and 3 replications in institute of medicinal plant (acecr (in karaj region in spring in 2010. the following is the treatment of this study: aqueous solution of methanol with levels of (10, 20, 30, 40, 50%), and aqueous solution of ethanol with levels (10, 20, 30, 40, 50%), and aqueous solution of mixed ethanol and methanol with the levels of (5, 15, 25%), and distilled water treatment and control treatment without spraying. results & discussion: the result of this study indicated that the effect of treatments on 23 evaluated index has significant difference (p