Enumeration of weed flora in mustard fields in Mahendranagar, Kanchanpur, Nepal

A total of 75 weed species were recorded in the mustard fields of upland and lowland sites of Mahendranagar, Kanchanpur. The number of weed species at upland site was higher (69) than that of lowland site (61). The dominant monocot families were Poaceae (16 species) and Cyperaceae (8 species). The dominant dicot families were Asteraceae (8 species), Scrophulariaceae (6 species each) and Leguminosae, Euphorbiaceae (5 species each). On the basis of density and IVI, 21 weed species dominated both the study sites. However, on the basis of density the upland site was more favorable for weeds then the lowland sites.