Leaves curl slightly or may become blistered. This disease occurs on leaves, buds and canes, causing a stunting and twisting of new growth. Leaf rust is another rose disease prevalent in Louisiana. It is recognized in the early stage by the appearance of rough, circular, bright orange spots on the underside of leaves and on stems. Spray with a triademizone material for best control.
Crown gall is recognized by the presence of rough galls or over growth on the roots, crown or canes.
Galls usually appear near the soil line or graft union. Infected plants become stunted. Discard infected plants. Other disease problems, including various fungal leaf spots and stem canker, are also common in Louisiana. Insects Insects and mites attack rose flowers and foliage.