番茄早疫病和番茄叶霉病两种叶斑类病害在甘肃发生普遍,危害严重,特别是在塑料大棚内危害更重,据1989～1990年在兰州调查,早疫病病叶率为40％～80％,严重者可达95％～100％;叶霉病叶率30％～70％,重者达85％以上。由于这两种病害危害,致使叶片提早于枯,产量降低,造成巨大损失。 1990年我们采用了全国农药网提供的复方代森锌进行了药效试验,取得了良好结果,现将试验结果报告如下: Tomato early blight and tomato leaf mold two kinds of leaf spot disease occurs in Gansu, serious harm, especially in plastic greenhouses more harmful, according to 1989-1990 survey in Lanzhou, early blight disease leaf rate of 40% 80%, severe cases up to 95% to 100%; leaf mold leaf rate 30% to 70%, severe cases of more than 85%. As a result of these two kinds of disease hazards, resulting in earlier leaves withered, yield reduced, resulting in huge losses. In 1990 we used the national pesticide network to provide the compound on behalf of Sen Zinc efficacy test, and achieved good results, the test results are reported as follows: