September 13, 2006
Aster yellows is a fairly common disease that can cause bizarre symptoms on a wide variety of plants. The disease can be found on hundreds of plants, including many flowers and vegetables, such as coneflower, daisy, marigold, zinnia, snapdragon, chrysanthemum, tomato, carrot and lettuce.
Samples with the following problems have been seen in the Plant Disease Clinic recently:
Apple scab on crabapple
Aster yellows on coneflower