Due to their fragrant, sweet flavor and ten-month-long growing season, citrus trees are highly susceptible to pests and diseases. Taiwan's hot, humid climate and poor pest management only make it harder.
柑橘類汁多香甜，生長期長（柳丁從開花到收成長達 10 個月），原本就是果樹中病蟲害最多的一種，而台灣潮濕高溫，蟲害管理尤為不易，更何況以台灣土壤被摧殘的情況，難度再上一層。