September 13, 2006
Samples with the following problems have been seen in the Plant Disease Clinic recently:
Apple scab on crabapple
Aster yellows on coneflower
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.