西瓜细菌性果斑病药剂防治试验

Test on Drug Control of Acidovorax avenae subsp.Citrulli

用7种药剂分别采用药液浸种法、苗期喷雾法、果实发病初期喷雾的方法防治西瓜细菌性果斑病。结果表明:关键用药时期为苗期,最可靠的药剂为47%加瑞农可湿性粉剂和90%新植霉素可溶性粉剂,2种药剂苗期防效均超过80%,其次是农用链霉素和DT杀菌剂。种子处理方法的防效均不理想,最高的也不超过50%。果实发病初期喷药方法次之,最高防效为55.6%,可作为补充防治方法。

In the test, separately adopts the method of treated seed with fungicides, the method of spraying in seedling stage, the method of spraying in the pramary stage of fruit flareing up of disease to control Acidovorax avenae subsp. Citrulli by using 7 kinds of drugs. The result indicated that the key time of spaying drug to control the disease was in seedling stage, the most reliable drugs were 47% wetable powder mancozeb and 90% New Zhimeisu SP, their preven- tion effect were all above 80%, secondary drugs were Streptomycin SP（solube powder） and DT germicide. The prevention effect by the method of treated seed with fungicides were all not good, the highest was not above 50%, the prevention effect by the method of spraying in the pramary period of fruit flareing up of disease was seeondary, the highest was 55.6%, can be one additonal control method.