In the later stages of infection, plants remain severely stunted and yellowed and may collapse. Invasion by secondary rot organisms results in soft rots and hollowed cavities in the plant crowns. Aster yellows also causes similar yellowing and stunting. However, aster yellows usually causes severe petiole twisting and lacks the vascular discoloration caused by Fusarium yellows. The fungus can be moved about in infected plant residues and in infested soil.
Symptoms are most severe on the summer celery crops because of warmer soil and air temperatures.
Avoid fields with known histories of the disease. The Regents of the University of California. All rights reserved. For noncommercial purposes only, any Web site may link directly to this page or photo file. Unfortunately, we cannot provide individual solutions to specific pest problems.