美国田纳西州大学植物病理学家艾伯特、钱伯斯(Albert·Chambers)在1976—1982年和1979—1982年于两地分别做了两组试验。两组均设施钾肥区、施杀菌剂区、两者兼施区,以不施钾肥与杀菌剂为对照。土质为粉沙壤土,含钾9斤/亩,含磷4.5斤/亩。在试验期间,每年施钾9斤/亩,(K_2O)。施用的杀菌剂为甲基托布津、百菌清、苯莱特,主要防治由炭疽菌和壳针孢菌引起的叶斑病,还有哇眼病和基枯 Albert Chambers, a plant pathologist at the University of Tennessee, USA, conducted two separate trials in 1976-1982 and 1979-1982. Both facilities have facilities for potash fertilizer application and fungicide application, both of which apply fertilizer and disinfectant as control. Soil for the pink sandy loam, potassium 9 kg / mu, phosphorus 4.5 kg / mu. During the experiment, potassium is applied to 9 kg / mu (K_2O) annually. The fungicides to be administered are thiophanate-methyl, chlorothalonil and benilate, which are mainly used for the control of leaf spot caused by anthracnose and Septoria spp.