Turkish Journal of Agriculture and Forestry




This study was carried out in order to determine the species, density, frequency and sociability of weeds in sunflower in Pasinler and Köprüköy districts of Erzurum in 1990 and 1995. In the study, 85 different weed species belonging to 27 families were identified with a density of 65.57 weeds per square meter on average. The number of species recorded in Pasinler and Köprüköy was 67 and 60 with a density of 63.35 and 67.78 weeds per meter square respectively. Sinapis arvensis was a predominant species in both areas. The most common species in Pasinler were Convolvulus arvensis, S. arvensis, Cirsium arvense whereas S. arvensis, C. arvensis, Chenopodium album, C. arvense were prevalent in Köprüköy. The main weed species forming sociability with others was C. arvensis and S. arvensis in Pasinler and Köprüköy respectively

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