测定了５０％果病清悬浮剂在田间条件下防治苹果黑星病（Ｖｅｎｔｕｒｉａｉｎａｅｑｕａｌｉｓ）、炭疽病（Ｇｌｏｍｅｒｅｌａｃｉｎｇｕｌａｔｅ）、白粉病（ＰｏｄｏｓｐｈａｅｒａＬｅｕｃｏｔｒｉｃｈ）、锈病（Ｇｙｍｏｎ－ｓｐｏｒｐｏｒａｎｇｉｕｍｙａｍａｄａｅ）等４种苹果树主要病害的效果、有效使用浓度及对果树的安全性。结果表明，果病清防治苹果病害效果显著，防效达８５％～９０％，优于常规对照药剂；最佳使用浓度为６００～８００倍；施药时间以发病前或发病初期为宜；施药次数２～３次，间隔１０～１５ｄ为佳。 The effects of 50% fruit suspension concentrate on controlling four major apple tree diseases, such as Venturia naequalis, Glomerelacingulate, Podosphaera leucotrich and Gymon-sporporangium yamadae, were tested in the field. Effective use of concentration and safety of fruit trees. The results showed that the fruit disease prevention and treatment of apple disease significantly effective, control effect of 85% to 90%, superior to conventional control agents; the best concentration of 600 to 800 times; application time before or at the onset of disease is appropriate; Shi The number of drugs 2 to 3 times, interval 10 ~ 15d is better.