1987年4月,在腐烂病发病率60%的纸坊镇青山村果园,用 S—621农药抗生素进行了防治腐烂病的试验。结果看出,用S—921防治萍果树腐烂病,在春秋两季都能获得显著效果,其中30倍、50倍液在纵刻病部后涂抹治愈率高达99 %以上,复发现象极少,比常用砷平液60倍防效好。另外在生长季对枝 April 1987, in the 60% incidence of decay in the paper mill town of Qingshancun orchard, with S-621 pesticide antibiotics to prevent rot disease test. The results showed that the use of S-921 prevention and treatment of apple tree rot disease in the spring and autumn can get significant results, of which 30 times, 50 times in the longitudinal part of the Ministry smear cure rate of 99% or more, the recurrence of rare, 60 times more effective than common arsenic solution. In addition to the growing season on the branches