Studying Geographical Distribution Map of Weeds of Irrigated Wheat Fields of Ardabil Province

In order to identify the density and abundance of weeds in irrigated wheat fields of Ardabil Province, 76 samples of irrigated wheat fields based on cultivation area from all counties of Ardabil province for six years (2001-2006) were selected. The genus and species of weeds from each sampling fields and their population indices density, frequency and uniformity of each species were calculated by using Thomas method. Geographic coordinates of field (Latitude, Altitude and Elevation) were the main coverage and were determined by using GPS. These data were used for producing weed maps using GIS in irrigated wheat fields of Ardabil province. Results showed that bedstraw (Galium tricurnatum), Fumitory(Fumaria vaillanti)and wildradish (Raphanus raphanistrum) were dominant broad leaf weed species and wild oats (Avena fatua), rye (Secale cereal) and mouse foxtail(Alopecurus myosuroides) dominant grassy weeds species in irrigated wheat fields of Ardabil province. Bindweed (Convolvulus arvensis), Canada thistle(Cirsium arvense)and Acroptilon repens were the most important disturbing plants prior to harvesting in irrigated wheat fields of Ardabil province.