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大葱是我市南湖乡主要的经济作物,每年复种面积均在1500亩以上,产值约120万元。但1989年以来,由于霜霉、紫斑病的复合侵染,致使大葱生长中后期大面积倒秧,严重地块减产50％以上。为筛选防治两病的有效药剂,我们于1991年8月下旬对代森锰锌等7种杀菌剂进行了药效试验,现初报如下:材料和方法(一)试验处理①60％代森锰锌(W P,沈阳农药厂),600倍液。②70％复方代森锰锌(WP,南通市第三化工厂),600倍液。③50％瑞毒铜(WP,成都植物生长素厂),600倍液。
Welsh onion is the main economic crop of Nanhu Township in our city, and the area of double-cropping is more than 1,500 mu each year with the output value of about 1.2 million yuan. However, since 1989, due to downy mildew, purple spot composite infection, resulting in the late growth of large parts of green onion inversed, a serious block cut more than 50%. In order to screen the two agents for effective prevention and treatment, we carried out the efficacy test of 7 fungicides such as mancozeb in late August 1991, the first report is as follows: Materials and Methods (a) Test Treatment ① 60% Zinc (WP, Shenyang Pesticide Factory), 600 times liquid. ② 70% compound mancozeb (WP, Nantong third chemical plant), 600 times the liquid. ③ 50% Ruoxu copper (WP, Chengdu plant auxin plant), 600 times the liquid.