陕西省大力县沙苑农场园艺师常春同志研制出用沥青防治苹果树腐烂病,此法比日本园艺工程师田中幸氏教授的泥疗法省工两倍。用沥青防治方法简便、经济实用、疗效佳、工效高。具体方法是:用沥青15公斤(打成碎块),加汽油5公斤,放进容器内小火熬制,成稀糊状为宜。一般随用随加温。然后用 Dali County, Shaanxi Province Shayuan farm gardener Changchun developed with asphalt prevention and treatment of apple tree rot disease, this method than Japan’s horticultural engineer Professor Tanaka mud treatment twice as labor-saving. Asphalt control method is simple, economical and practical, good curative effect, high work efficiency. The specific method is: with asphalt 15 kilograms (smashed into pieces), add 5 kilograms of gasoline, into the container within the small fire brewing, into a thin paste is appropriate. General with the use of heating. Then use