脐橙果大质优 ,深受消费者的欢迎。但其极易感染溃疡病 ,同时 ,炭疽病 ,锈壁虱也极易为害 ,严重影响树势和产量。 1999年度 ,我们引进美国罗门哈斯公司生产的大生Ｍ - 4 5可湿性粉剂 (以下简称大生 )防治脐橙以上三种病虫害 ,效果良好。1　材料和方法试验于 1999年 6月～ 8月在 Navel orange fruit high quality, welcomed by consumers. However, it is extremely susceptible to ulcer disease. In the meantime, anthracnose and rust ticks are also extremely vulnerable and seriously affect tree vigor and yield. In 1999, we introduced Health M - 45 wettable powder produced by Rohm and Haas Company in the United States (hereinafter referred to as “Health”) to prevent and treat the above three diseases and pests of navel orange, and the effect was good. 1 Materials and Methods Test in June 1999 ~ August