喷施亚磷酸钾对富士苹果黑星病的预防效果

Prevention Effect of Spraying Potassium Phosphite on ‘Fuji’ Apple Scab

研究了喷施亚磷酸钾对富士苹果黑星病的预防效果。试验结果发现喷施亚磷酸钾3~4次对苹果黑星病发生有一定的预防控制效果,与对照组相比,亚磷酸钾对预防黑星病的发生起到了良好的作用,能降低中后期苹果黑星病发生程度25%~35%左右。亚磷酸钾可推荐作为黑星病预防药剂的补充肥料,建议与内吸性杀菌剂配合或交替使用。

This study examined the effectiveness of spraying potassium phosphitein in controlling scab in‘Fuji’apple tree.Results showed that spraying potassium phosphite 3~4 times was effective in preventing and controlling apple scab.Compared with the control,potassium phosphite significantly reduced the occurrence of apple scab by 25%~35%.Therefore,potassium phosphite is recommended as a supplementary fertilizer for the prevention of scab and can be used in combination with or as an alternatively to systemic fungicide.