Description Cyco Dr. Repair treats chlorosis and environmental stresses. Chlorosis is a yellowing of leaf tissue due to a lack of chlorophyll. Possible causes of chlorosis include poor drainage, damaged roots, compacted roots, high alkalinity and more importantly nutrient deficiencies in the plant. Environmental stress can damage plant function or its development which shortens the time for photosynthesis and in turn reduces yield. The lack of iron is one of the more common nutrient Deficiencies in plants associated with chlorosis. Dr. Repair helps to restore your plant to its full potential.