Curly Top, Several Mosaics, Leaf Roll, Spindle Tuber (viruses): Plants may be stunted and off-color. Foliage is mottled or leaflets tend to roll up. Tubers are often small, and in case of spindle tuber, elongated. Several viruses can infect potato without causing noticeable symptoms. However, yields can be reduced drastically. Use of seed certified to be true to variety and free of disease agents is the best way to control tuber-borne viruses. Control insects.
