Aster Yellows Symptoms on Carrot

Aster Yellows (Mycoplasma): The first symptom of aster yellows is yellowing of the foliage [Photo #6], followed by excessive growth and bunching of shoots. Older leaves become twisted and may fall off. Leaves later have a bronzed appearance. Roots are misshapen, and are of poor quality with a proliferation of adventitious roots [Photo #8]. This organism is transmitted by leafhoppers. weeds in and surrounding the crop can serve as a reservoir for this pathogen. The disease usually occurs sporadically with little economic loss.