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Value of Cultivation and Use (VCU) trials conduction for the purpose of candidate to introduction and release as a new cultivar new genotypes have more importance. Cotton is the most important fiber crops which that cultivation in Iran also very important. Low number cotton commercial cultivars introduced by now and therefore cotton new cultivars introduction is important for cotton cultivation development. In order to evaluation of six new forign cotton cultivars Value of Cultivation and Use(VCU) determination, an experiment was conducted at four provinces, South Khorasan(Birjand), Fars(Darab), Golestan(Anbar Oloom) and Ardabil(Moghan) based on compelet randomized design by four replications.New foreign studied cultivars were: Carisma, 2- Lydia, 3-PG2018, 4-BA440, 5-Flash and 6-Edesa and also, control cultivars were: Varamin(South Khorasan and Ardabil), Khordad(South Khorasan), Latif and Sahel cultivars(Golestan), Bakhtegan and Golestan cultivars(Fars) and Mehr(Ardabil). Based on National Guideline for Testing Value for Cultivation abd Use of Cotton, seed cotton yield, boll number per plant, boll weight, earliness, lint percent, fibers length, fitness, elasticity, strength, reflectness and yellowness were measured. Totally, based on research results, Lydia cultivar because its high seed cotton yield and boll weight and some fiber quality traits, rhat cultivar cultivation in South Khorasan province recommendable. Also for the reason higher seed cotton yield and more earliness and lint percent and more tolerance to Verticellium wilt of BA440 cultivar, that cultivar cultivation is recommendable for Golestan province. Based on results of research in Fars province and because of Carisma cultivar high susceptibility to Verticellium wilt, Lydia cultivar cultivatin was recommended for Fars province. Also Flash and Lydia cultivars cultivation in Ardabil province recommended. Key words: Cotton, Cultivar, Value of Cultivation and Use trial, Yield, Yield Components.
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