PJB-2020-6
Weeds suppression in spring maize through allelopathic effect of sorghum, sunflower and parthenium plants
Haroon Ur Rashid
Abstract
Pot experiment was conducted during June-July 2013 and Sept-Oct 2013 in weed science research laboratory the University of Agriculture Peshawar. Integrated weeds management in spring maize were studied through allelopathic effect of sorghum, sunflower and parthenium. Allelopathic plants (Sorghum, sunflower and parthenium) water extract applied alone and in its mutual combination were used against spring maize and its associated weeds. The experiment was carried out by seasonal analysis of completely randomize design (CRD) having three replications. Allelopathic plants showed significant results against test species viz Zea mays, Trianthema portulacastrum and lolium rigidum seeds. Water extracts of sorghum + sunflower + parthenium showed significant activity against weeds of maize, which reduced the seed germination, time to germination, shoot length and dry biomass of weeds as compared to other extracts, however herbicide activity was found slightly more than water extracts. The degree of toxicity for the various treatment types can be placed in the following order of inhibition: Herbicide > combined extracts > isolated extracts. The current study showed that all the tested allelopathic plants contain water soluble allelochemicals which could inhibit/greatly retard the germination % and seedling parameters of other species. Hence, the findings of current study suggest that there is the possibility to use these extracts as an alternative to synthetic herbicide for sustainable weed management, however further study is required to investigate the allelopathic activities of these extracts under field condition.
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