紫云英(又名红花草子)是南方稻区的冬季主要绿肥。近年来,我县紫云英普遍发生菌核病、白粉病、叶斑病类。据最近两年统计,发病面积占种植面积的40—60%,发病蔸率50%以上的面积在10%上下,个别田块甚至因病而基本失收。在与病害作斗争中,全县不少社队摸索出较好的防治方法。水浸坪公社峦山大队,地处山区谷地,雾重水冷,烂泥田多。由于他们深挖排水圳,密开爽水沟,加强了病害的防治工作,紫云英亩产鲜草由1970年的1,000—2,000斤上升到4,000—5,000斤,高产田达到7,000斤。 Astragalus (also known as safflower grass) is the southern part of the main green manure in winter. In recent years, my county common occurrence of sclerotinia, powdery mildew, leaf spot disease. According to the statistics of the past two years, the area covered by the disease accounts for 40-60% of the acreage. The area with the disease incidence of over 50% is above 10%, and individual fields even lose due to illness. In the fight with the disease, the county many communities to find out a better prevention and treatment methods. Covered commune Canshan brigade, is located in the mountain valley, fog heavy water, mud and more mud. As they dug deep into drainage ditches and dredged open drainage ditches to strengthen the prevention and treatment of diseases, the yield of fresh purple grasses increased from 1,000-2,000 kg in 1970 to 4,000-5,000 kg and the high yield was 7,000 kg.