Malformation on flowering shoots late in summer. Yellow flowers may turn into green capsule-like structures, pods are sterile, growth starts again and is dense and tangled. Renewed growth is especially noticeable on lodged plants. Affected parts of flowering shoots sometimes have a purplish color.
The disease is sometimes confused with sulphur deficiency, but with aster yellows the affected plants are scattered among normal healthy plants.
Usually the percentage of infected plants in a crop is low and does not cause significant damage.
