从 1999年以来 ,随着台湾青枣在云南干热区域较大面积引种栽培 ,在生产上表现较突出的缺素症状 ,缺铁性黄叶病发生严重。据对楚雄州元谋、保山地区潞江坝、昆明市东川区等地实地调查 ,植株发病率约 10 %左右 ,且随着树龄和结果量的增加 ,发病率呈迅速上升趋势。有些树体栽培当 Since 1999, with the introduction and cultivation of Taiwan green jujube in a large area in dry and hot areas of Yunnan Province, the most notable deficiency in production is the occurrence of iron deficiency yellow leaf disease. According to field surveys in Yuanmou of Chuxiong Prefecture, Lujiangba in Baoshan Area and Dongchuan District in Kunming, the incidence rate of the plants was about 10%, and the incidence rate showed a rapid upward trend with the increase of the tree age and the result amount. Some trees are cultivated