农业科学通讯1955年第一期刊登了徐荫昌同志的“稀释石灰硫黄合剂的简便方法”一文,表2备註中有“冬季防治果树病虫害和早春防治小麦锈病都宜用稀释常数20或17.65”。我认为这里有些偏差,因为冬季防治果树病虫害一般是用5°波美,如用稀释常数20或17.65,则所得的浓度为波美0.4—0.5°,所以我认为冬季和早春防治果树病虫害宜用稀释常数1.5,才能杀死果 The first issue of Agricultural Science Newsletter published in 1955 Comrade Xu Yinchang “a simple method of diluting the lime sulfur mixture”, a note in Table 2 “winter prevention and control of pests of pests and early spring wheat rust should be used with a dilution constant of 20 or 17.65 ”. I think there are some deviations here, because pest control in winter is generally 5 ° Baume and if the dilution constant is 20 or 17.65, the resulting concentration is Baume 0.4-0.5 °, so I think winter and early spring should be used to control pests of fruit trees Dilute the constant 1.5, to kill the fruit