五莲县近几年随着苹果产量的逐年上升，加上果农急于成花结果，对主干进行连年环剥，造成树势严重衰弱，致使早期落叶病，枝、干腐烂病及根腐病日趋严重。为此，于１９９４～１９９７年就国内常用的几种杀菌剂进行筛选试验，以便选出最佳防治药剂。１材料与方法试验设在本... Wulian County in recent years with the annual increase in apple production, coupled with the fruit growers rush to flower results, the perennial girdling the trunk, resulting in a serious frail weakness, leading to early deciduous disease, branches, dry decay and root rot increasingly serious. To this end, in 1994 to 1997 several domestic commonly used fungicides screening test in order to choose the best prevention and treatment agents. 1 material and method testing in this ...