我场从1982年开始试验用“砷渗剂”(即用杀菌剂福美砷+JFC润湿剂)治疗苹果和梨树上的腐烂病。方法是将病斑先行刻道,然后用该制剂涂抹。1983—1984年我们将此疗法在全场1400亩果树上全面推广应用,其治疗效果是非常显著的,治愈率几乎达百分之百,至今很少有复发现象。这和有关同志的报道基本上是一致的。但通过三年来的实践,我们体会到应用“砷渗剂”治疗腐烂病斑,要想达到预期的效果,在操作过程中,应注意以下几个问题: 1、药剂使用浓度不宜过高。通过筛选试验,我们认为用50％福美砷加水稀释到40倍,JFC润湿剂加水稀释到50倍,即可取得良好的治疗效果。浓度过高,不仅加大了治疗成 My field since 1982 to test the use of “arsenic penetration agent” (ie fungicide Fumei arsenic + JFC wetting agent) for the treatment of rot on apple and pear trees. The method is to first carve the lesion, and then use the preparation smear. From 1983 to 1984, we comprehensively applied this therapy to 1,400 mu of fruit trees in the whole field. The treatment effect is very remarkable. The cure rate is almost 100%. So far, few recurrences have been reported. This is basically consistent with the comrades reported. However, through the practice of the past three years, we have realized that the application of “arsenic penetration agent” in the treatment of rot disease spots, in order to achieve the desired effect, should pay attention to the following questions during the operation: 1. The concentration of the drug used should not be too high. Through the screening test, we think that with 50% Fortum arsenic diluted with water to 40 times, JFC wetting agent diluted with water to 50 times, you can get a good therapeutic effect. Concentration is too high, not only increased treatment into