Aster yellows

Aster yellows is a disease caused by Aster yellows phytoplasma affecting several genera of herbaceous plants, primarily in the Aster family.

Symptoms
It can cause phyllody, yellowing, stunting, loss of pigmentation in or sterility of flowers, and necrosis.

Treatment
No treatment is available to save a plant infected with aster yellows. It is best managed by removing infected plants from the garden to minimize spread.

Prevention
Management of the insect vector is not usually feasible in a home garden.