CURL-STRIPE disease has seriously affected certain plantings of Lilium longiflorum Thunb. in Oregon and California. Control approaches have been uncertain because occurrence patterns and symptomology were equally indicative of nutritional imbalance or virus ætiology and because we had been unable to transmit the disease1. Early-season symptoms, central striping of young leaves due to retardation of plastid formation, followed by curling and twisting of leaves, are striking. Such symptoms may continue or, more usually, later formed foliage may be normal. Bulbs from such plants may or may not produce visibly diseased plants the following year. Such symptom variability is atypical of virus infections of bulb plants.