A study of effectiveness of methyle bromide (MB) and two of its alternatives were carried out to evaluate their impact on soil sterilization, the density of nematode and on the growth and production of carnation crop. The experement was carried out in two plastic houses of 400m2 in Zabadani region during 1999-2000.The treatments were as follows; MB(28g/m2), metam sodium (75cm3/m2), soil steaming and control. The results showed significant-differences between the control and the treatments, where the effectiveness of reducing the density of nematodes were 55.6%, 53.4%, 69.9% and 0% respectively. The soil steaming treatment encouraged the plant vigour and harvest started earlier, but the average number of carnation flowers for the different treatments were 28.3, 23.9, 32.8 and 23.8 (flowers during each harvest day) respectively. Confirmed differences were found for yield, where the highest number of carnation flowers were found in the plots treated with metam sodium, and therefor we recommend using metam sodium as a part of integrated pest management program of nematodes in carnation cultivatar.