To provide a treatment fluid for Citrus Greening Disease which can treat citrus trees having Citrus Greening Disease and a treatment method using the treatment fluid.The treatment fluid for Citrus Greening Disease contains Fe ions, at least some of which are present as Fe2+ ions. The treatment fluid contains a predetermined amount of Fe ions and acids. Citrus Greening Disease can be treated by spraying the treatment fluid over the leaf surface of a citrus tree having Citrus Greening Disease or by pouring the treatment fluid around the base of the tree.本發明提供一種可治療患有柑橘綠化疾病之柑橘類之樹木的用於柑橘綠化疾病之治療液及使用其之治療方法。用於柑橘綠化疾病之治療液含有Fe離子,且該Fe離子之至少一部分係以Fe2+離子存在。該治療液含有一預定量之Fe離子與酸。將該治療液散布於感染有柑橘綠化疾病之柑橘類之樹木的葉面、或者將該治療液灌注於樹木根部的周圍,藉此可治療柑橘綠化疾病。
