介绍一种抑制柑桔溃疡病的有效方法柚、橙类和红桔单独成片栽植时易发生溃疡病，其中尤以柚、橙为甚。一般果园每年对该病需用药４～６次，效果仍不理想。我们通过多年的观察与试验证明：柚、橙类与温州蜜柑或柑均匀混栽于同一小区（或每株树部分大枝高接其他品种），只... Introduction of an effective method to inhibit citrus canker ulcer pomelo, oranges and red orange alone into a film planting prone to ulcer disease, especially pomelo, orange is even more. The general orchard needs treatment for the disease 4 to 6 times a year, the effect is still not satisfactory. Through years of observation and experiment, we have proved: pomelo, oranges and mandarin orange or citrus evenly mixed in the same district (or each branch of trees with a large number of other varieties), only ...