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在肯尼亚的大田试验中,采用4种铜剂配方(氢氧化铜、氧化亚铜、王铜和波尔多液)有效地防治咖啡细菌性叶疫病和浆果病,并且明显地增加去壳咖啡的产量。在这两种病害严重发生的情况下,氢氧化铜的效果最佳。在有机质含量低的轻质土上喷施铜剂后发生植物毒性症状,但在重质土壤上却没有出现这种情况。喷施铜剂一年,其残效致使咖啡树下一年的感病性增高,连续喷施两年对防治这两种病害和产量有明显的效果。但过度使用铜剂会出现长期的植物毒性问题。
In field trials in Kenya, four copper formulations (cupric hydroxide, cuprous oxide, copper and Bordeaux mixture) were used to effectively control bacterial leaf blight and berry disease in coffee and significantly increase the yield of dehulled coffee. In the case of serious occurrence of these two diseases, the best effect of copper hydroxide. Phytotoxicity symptoms occur after copper is sprayed on light soil with low organic matter content, but this is not the case in heavy soils. One year of spraying copper, its residual effect caused the next year, the coffee tree increased susceptibility, continuous spraying two years of prevention and treatment of these two diseases and yield significant results. However, excessive use of copper can cause long-term phytotoxicity problems.