Zinc deficiency in corn first appears in young leaves. When there is moderate to severe deficiency, the leaves are small and deformed, with shortened internodes and clustered leaflets. Some are accompanied by symptoms of leaf yellowing and interveinal yellowing. The leaves turn yellow-green, but the parts immediately adjacent to the leaf veins remain green. In the seedling stage of corn, the middle and lower parts of new leaves turn yellow and white to form white seedlings, also known as white seedlings. After jointing, there is a zinc deficiency. Yellow and white stripes appear on the lower half of the leaves, which are translucent, silk-like and plastic film-like, and are easily torn by wind. , called mosaic stripe disease. You can spray rooting agent plus amino acid foliar fertilizer plus zinc sulfate. Spray continuously every 5 to 7 days.