沙田柚易感溃疡病，严重时引起落叶落果，降低果实品质和商品价值。笔者从１９９３年开始，连续６年用氧氯化铜防治溃疡病和炭疽病，取得了满意的效果。溃疡病严重的果园，冬季要修剪清园，５～６月大雨过后喷氧氯化铜３００倍液一次，未结果树夏秋梢要结合防治潜叶蛾。新... Soybean pomelo is susceptible to ulcer disease, causing deciduous fruit drop in severe cases, reducing fruit quality and commodity value. The author from 1993 onwards, for 6 consecutive years with copper oxychloride ulcer disease prevention and anthrax, and achieved satisfactory results. Canker orchard serious, winter to prune the Qingyuan, 5 to June after spraying copper oxychloride 300 times a time, not the results of summer and autumn shoots to prevent and control leaf moths. new...