Corynespora leaf spot of zebra plant is usually only a problem during the propagation phase since only then are plants kept under very high moisture and humidity conditions. Apparently healthy cuttings may develop severe symptoms of disease. Control - Elimination of overhead water can control this disease. Aphelandra leaf crinkle has been recognized in Florida since 1973 and was described from Texas in 1981. The disease is typified by pronounced stunting of terminal growth, reduced leaf size and downward puckering and curling back of leaves.
Affected plants continue to produce symptomatic leaves regardless of cultural condition.
In addition, production of rooted cutting from crinkle affected plants is reduced in both quality of cuttings available and ability of the cutting to root. Treatment of affected plants with 100-150 ppm of chlortetracycline or tetracycline did not result in remission of symptoms. Electron microscope examination of affected and unaffected tissue did not reveal virus particles. Incidence of leaf crinkle increases as both temperature and light intensity increase, and control should be based on keeping these cultural conditions at optimal levels for plant production. Symptomatic plants should be removed from the stock or production area.