PHOMA SPECIES ON BEET: MORE CAUSE DISEASE THAN JUST PHOMA BETAE

摘要

Phoma can cause damage to sugar beet {Beta vulgaris) at multiple growth stages. It has historically been an important seedling disease, but this is largely managed by ensuring clean seed for planting. The pathogen also can cause a root rot, a leaf spot, and rotting of beets during storage. In the United States, the only pathogenic Phoma associated with beets has been Phoma betae. In Europe, other species of Phoma have been reported to cause symptoms on sugar beet. Phoma isolates from sugar beet in the United States were examined to determine whether there might be more species causing symptoms on beet. Phoma isolates had been collected as part of ongoing surveys for seedling diseases and root rot, and additional samples were collected from leaf spots.