Late attack on tomato plants is inclined to cause the forming of blossoms almost to the ends of the branches with an abnormal number of fruits that never attain a desirable size or quality. In Colorado's Western Slope, symptoms of psyllid yellows is similar to another common tomato disorder produced by the curly top virus. If the attack on potato plants occurs before tuber set, a likely result is the formation of numerous tubers on each stolon. An attack after tubers are partially developed usually results in greatly retarded growth and irregularly shaped potatoes . Potatoes from infested plants may sprout prematurely, even underground.
Psyllids also occur on other plants in the potato family, such as eggplant and pepper.
Damage to these crops by psyllids has not been reported.