25%阿米西达SC对苹果树安全性及防治苹果白粉病的药效试验

Control Effect of 25% Amistar SC on Apple Powdery Mildew and Its Safety

本试验在田间条件下 ,研究了 2 5 %阿米西达SC对不同苹果树品种的安全性及其防治苹果白粉病的药效和使用浓度。结果表明 :2 5 %阿米西达SC对澳州青苹、北斗、黄元帅、新红星、红富士、秦冠 6个苹果品种安全性较好 ,无任何不良影响 ,但对嘎啦品种的苹果树有严重的药害产生 ,导致果锈和叶片焦枯脱落。 2 5 %阿米西达SC对苹果白粉病有较显著的防效 ,防效可达 85 %～ 90 % ,使用浓度为 0 .12 5g L～ 0 .0 83g L ,间隔期 7d喷 1次 ,连喷 3次。

The control effect,safety and optimal dilutions of 25% Amistar SC to apple powdery mildew were tested in field.The results showed that 25% Amistar SC was safe to be used on Australian green apple, Beidou,Huang Yuan Shuai, New Red great control effect on apple powdery mildew.The control effect made up from 85% to 90% when it was used 3 times every 7 days with 0.125g/L to 0.083g/L dilutions in field.