We’re stumped. If the leaves are twisted, that’s often a sign of herbicide damage; have any chemicals gotten near these plants or drifted over?
Otherwise, distortion is usually due to Aster yellows but that’s usually later in the season and very noticable because of yellowed petals and leaves. Use an insecticide labeled for use on the aster leafhopper to prevent the disease. Your county cooperative extension can advise you as to the best one to use in your area and the correct timing of the application
We’re stumped. If the leaves are twisted, that’s often a sign of herbicide damage; have any chemicals gotten near these plants or drifted over?
Otherwise, distortion is usually due to Aster yellows but that’s usually later in the season and very noticable because of yellowed petals and leaves. Use an insecticide labeled for use on the aster leafhopper to prevent the disease. Your county cooperative extension can advise you as to the best one to use in your area and the correct timing of the application