药剂防治是玉米丝黑穗病的一项重要防治措施。我们在前两年工作的基础上,1978年继续进行了药剂筛选、药效测定及施药方式的试验。参加试验的药剂包括化学药剂及农用抗菌素两类,共16种。试验在武功进行。供试品种分别为白单4号和陕单1号。试验于5月初播种。试验区全部用0.1%菌土进行人工接种。试验处理有药剂拌种、闷种、浸种、苗期喷雾以及药剂单用和两种药剂复合使用等。试验结果归纳如下:供试的化学药剂中,在中感品种陕单1号上试验,防治效果超过90%的有:40%杀疽灵——福美双(1:1)可湿性粉剂,按种子量0.3—0.5%用药量进行拌 Chemical control is an important control measure of maize smut. On the basis of the previous two years of work, in 1978, we continued the tests of drug screening, efficacy measurement and application mode. Pharmacists participating in the trial include two types of chemicals and agricultural antibiotics, a total of 16 species. The test was conducted in martial arts. Test varieties were white No. 4 and Shan Shan No. 1 respectively. The trial was sown in early May. The test area was all manually inoculated with 0.1% bacteria. Test treatment with pharmaceutical seed dressing, boring, soaking, seedling spray and single agent and two agents used in combination. The test results are summarized as follows: Among the chemical agents tested, the susceptible variety Shandan No. 1 was tested. The prevention and cure effect was over 90%: 40% of elixir - thiram (1: 1) WP, 0.3-0.5% of seed dosage for mixing