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Average yield of Rice, Wheat, Maize and Pea crop is very low in Pakistan as compared to world. In present studies the possible role of sunflower allelopathy in decreasing the economic produce of these crops was evaluated. During early growth bioassays, all the test crops were subjected to different concentration of fresh and dry root, stem and leaf aqueous extracts of sunflower variety Hysun 33. Leaf extracts especially in higher concentrations, followed by stem and root, significantly inhibited the studied parameters of all test crops. During field trials sunflower was grown to maturity...

Ageratum conyzoides L. is an allelopathic weed. The present study was conducted to investigate the antifungal activity and allelopathic affects of A. conyzoides against Fusarium solani (Mart.) Sacc. which is a devastating pathogen on various plants. Different types of extracts i.e. aqueous, methanol and n-hexane of all vegetative plant parts e.g. inflorescence, leaf, stem and roots of A. conyzoides were tested for their antifungal activity in various concentrations. Leaf extracts proved to be most inhibitory and among all concentrations highest concentration markedly reduced the biomass...