| A plant with aster yellows develops weak, yellowing leaves and twisted or distorted stems and flowers. |
| The most interesting aster configuration occurs when the spindle is parallel to the surface. |
| In the autumn, net-veined aster and hollow-stemmed goldenrod add flashes of white and yellow, respectively. |
| Their research indicates that aster yellows are the primary disease concern. |
| Disease problems can include powdery mildew, Botrytis blight, aster yellows, leaf spots, viruses and foliar nematodes. |
| Stunted, twisted growth and oddly distorted flowers are the symptoms of aster yellows, a disease which often shows up in midsummer. |
