Allelopathic effect of sorghum and sunflower on Phalaris minor and wheat

A field experiment was conducted in G.B Pant University of Agriculture and Technology, Pantnagar during Rabi season of 2018–19 to evaluate the bioefficacy of aqueous extracts of sorghum and sunflower on Phalaris minor, as well as their effects on yield and yield attributing characters of wheat. The experiment was carried out with eight treatments, each with three replications in randomized block design (RBD). Treatment with pre fb early post-emergence application of sunflower extract recorded highest weed control efficiency and yield among the treatments having aqueous extract application. Maximum WCE was recorded in pre fb early post-emergence application sunflower followed by pre fb early post-emergence application sorghum in every stages of observation. The grain yield of weedy, pre- fb early post-emergence application sorghum, pre- fb early post-emergence application sunflower, weed free plot was recorded as 2.33, 4.13, 4.38, 5.14t/ha, respectively