Experiments were conducted to compare the effect of different soil treatments with compost against leek pests. Leek was been seriously damaged by Rhizoglyphus robini Claparede, Thrips tabaci and Chromatomyia horticola (Goureau). The soil treatment screening test in the leek field showed that the application of Calcium cyanamide at 500 kg/ha and Silicate slag at 500 kg/ha were significantly effective against R. robini, T tabaci and C. horticola. Effective control for bulb mites was alos obtained with application of 43 % Profenofos EC at dilution of 1000-fold.