一、试验目的目前防治玉米大斑病的较好药剂为50％敌菌灵可湿性粉剂,效果在50％左右。为了进一步提高其防效,我们进行了混加成膜物质——聚乙烯醇或苯氧乙酸试验。二、试验材料和方法 1.供试药剂:50％敌菌灵可湿性粉剂(吉林市石油化工所提供);聚乙烯醇为市售商品,白色粉末状;苯氧乙酸配成0.6％的水溶液。 2.试验地:为一般生产田,玉米品种为“望红×塔22C”。每一处理50平方米,3行区,顺序排列大区对比。 3.接菌:7月17日接菌。由高粱粒培养 First, the purpose of the test At present, prevention and treatment of maize leaf spot better agent 50% Zufen Ling wettable powder, the effect is about 50%. In order to further improve its control effect, we conducted a mixed-film material - polyvinyl alcohol or phenoxy acetic acid test. Second, the test materials and methods 1 for the test agent: 50% Zufen Ling wettable powder (Jilin Petrochemical provided); polyvinyl alcohol is a commercial product, white powder; phenoxy acetic acid dubbed 0.6% aqueous solution . 2. Test place: for the general production of corn, corn variety “red × tower 22C.” Each processing 50 square meters, 3 rows of districts, the order of regional contrast. 3. Inoculation: July 17 to inoculation. Grown from sorghum grain