通过两年田间试验,表明1%多抗霉素水剂对苹果树斑点落叶病有较好的防治效果,最佳用量为12.5~15.0 mg/kg(稀释倍数400-600倍),从5月下旬始见病斑时开始施药,每间隔15 d施药一次,至秋梢停止生长止.

• The field experiment for two years showed that Alternania mail Roberts could be treated well with 1%25 Polyoxin,whose best fitting was 12.5-15.0 mg/kg(dilutedness 400-600 times),and that it should be used every 15 days from the last ten day of May When seeing disease spot to autumn treetop.