Structural of Communities and Weed Mapping Distribution in Irrigated Wheat Fields of West Azerbaijan Province

Weed identification is considered the most fundamental task in weed management. It would be possible to decide on specific methods of weed control through availability of weed information in a particular location, otherwise applying different methods of control will not show satisfactory effects. Wheat is the most important crop in West Azerbaijan province so that more than 2000000 hectares are under wheat farming, based on Jihad Organization information. In order to identify dominance weeds and their density 48 fields were selected in 7 cities of West Azerbaijan province during 2004-2007. Based on Thomas method, a W pattern was selected considering the area of each field, and then 1m×1m quadrate was thrown accordingly. The genus and species within each quadrate were determined. By using specific formulas, the density, frequency and uniformity of each weed species were calculated. Geographic coordinate’s of each field (Latitude, Altitude and Elevation) were determined by using GPS. In irrigated wheat fields 52 weed species from 20 families were recognized from which. Sinapis arvensis L., Vicia sp; Conringia orientalis(L.) Andrz., and Fumaria parviflora Lam. had the highest density in irrigated wheat fields in West Azarbayjan province. The most dominant narrow leaf weeds were Secale cereale L., and Avena ludoviciana Dun.