There have been far too many reports of manganese toxicity in tobacco this season for a condition which is so easily corrected.
Manganese is one of the minor elements necessary for plant growth, but it is needed in very small amounts. When large amounts are taken up by a tobacco plant, light green or yellowish areas appear between the larger veins of the leaf. In severe cases the plant may be stunted or even die.
Smiley, Jones H. and Miller, Harold F., "Determine Liming Needs on Tobacco Land This Fall" (1963). Agronomy Notes. 149.