Grain Sink Size and Predisposition ofZea maysto Stalk Rot

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Abstract
Corn (Z. mays) plants with rotted [fungal infection] stalks had more kernels than genetically identical neighboring plants with healthy stalks. This was observed in comparisons of adjacent rotted and healthy plants of 30 hybrids at many USA locations and in another study of 7 hybrids in 2 plant populations in 1 location. Relationship of data to effects of rate of carbohydrate translocation to grain and roots, including the photosynthetic stress-translocation balance concept of predisposition of corn to stalk rots is discussed.

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