A bacterial leaf spot on Clausena lansium(Lour)Skeels was observed at the cam- pus of South China College of TropicalCrops in recent years.
近年来，华南热带作物学院校园内的黄皮树叶片发生一种细菌性叶斑病。
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Yunkai Great Mountain is located in the Southern fringe of south subtropical zone. There is enough heat for planting subtropical crops but not for tropicalcrops.