Yellow, chlorotic halos surround Cordana leaf spot lesions on a banana (Musa sp.), caused by the plant-pathogenic fungus, Cordana musae. 

Young banana (Musa sp.) plant with youngest leaf showing chlorotic, yellow stripes, an early symptom of calcium deficiency.

Naupaka plant with symptoms of foliar chlorosis, resulting from an adverse reaction to a nnearby herbicide application.

Marginal chlorosis of leaves on a Pritchardia palm, an indication of possible magnesium deficiency.

Yellowing (chlorosis) of foliage in a young field of edible ginger, an indication of possible bacterial wilt disease. 

Sago palm with Pestalotia leaf spots surrounded by areas of distinct chlorosis (halos).