Competitive weed flora of mulberry under irrigated conditions in southern Tamil Nadu.

摘要

The results of a survey to investigate the diversity of weed flora of mulberry garden in southern Tamil Nadu (Tirunelveli district) under irrigated condition are described and details of weed species including common and vernacular names, relative density (%), family abundance (number of species/family) and their life form percentage are given. Total numbers of 27 weed species were recorded from 26 genera and 15 families. Among these weed species the relative density was recorded highest with Cyperus rotundus (18.9%) followed by Trianthema portulacastrum (15.2%), Cynodon dactylone (10.3%), Tridax procumbens (9.4%), Acalypha indica (6.6%), Parthenium hysterophorus (5.8%), Tribulus terrestris (4.9%), Dactyloctenium aegyptium (4.1%) and Euphorbia hirta (3.65%). The dominant families were Poaceae and Amaranthaceae contributed 4 species each followed by Asteraceae and Euphorbiaceae (3 species each) and Cyperaceae and Malvaceae (2 species each). Most of the species recorded were annual (63%) followed by annual perennial (22%) and perennial (15%).