Varietal response of maize (Zea mays L.) against weeds aqueous extracts.
Allelopathic effects of the four weed species viz., Sorghum halepense L., Trianthema portulacastrum L., Parthenium hysterophorus L. and Xanthium strumarium L. were examined on maize (Zea mays L.) cultivars (Azam and Jalal) under greenhouse experiment. The experiment was arranged in completely randomized design (CRD) with factorial arrangements with three replications. The results indicated that the extracts of all the tested weeds had significantly affected all the studied parameters in maize cultivars as compared to the control treatment. However, among the weed extracts T. portulacastrum proved more suppressive to maize cultivars by producing the minimum plant height. Though, the effects of S. halepense and P. hysterophorus were also statistically comparable in some parameters with the effects of T. portulacastrum. On the other hand the varietal response towards weed extracts was found to be non-significant for all the studied parameters. It is concluded that the studied weeds should be exploited for their possible allelopathic affects for weed control in maize.