Frozen or chilled potatoes should not beused for seed because the cut surfaces may not heal and seed-piece decay will result. Hollow Heart Hollow heart, a cavity near the centre of the tuber, results from rapid tuber growth. Walls of the cavities are white to light brown. The disorder is important because affected tubers have no external symptoms. They can only be removed with expensive X-ray grading equipment.
Hollow heart is promoted by growing conditions that cause rapid tuber enlargement.
Poor stand increases the amount of hollow heart. Malformed Tubers Secondary growth, knobs, and other tuber deformities may be caused by extreme soil temperatures. Other conditions such as nutrient and water imbalances, have been implicated in irregular tuber development. Growth cracks may arise from rapid tuber growth and are often the result of improper fertilizer placement. Chemicals used for control of potato diseases.