In recent years, the culm rust of bamboo is rather widely and seriously distributed in Jiangsu and Zhejiang provinces.A large-scale (60 mu of glaucous bamboo forest) field control experiment of culm rust of bamboo had been carried out from 1984 to 1986, coating the disease portions with 1:1 coal tar and diesel oil mixture after the bamboo was chopped down as usual in the early and middle of March every year. For three successive years, the disease has been successfully controlled, the direct control results were respectively 89.9%, 82.8%and 97.1%. The incidence of fresh bamboo reduced from 26.0% to 2.2%, and the total incidence reduced from 35% to 6.7%. The controlling costs were usually 0.167 yuan per-mu.