KWS

Phoma leaf spot disease

Causal agent: Phoma betae (= Pleospora betae)
Symptoms: Large, bright, round lesions develop on the leaves with concentrically dark rings consisting of numerous pycnidia. Often the dead tissue becomes brittle.
Economic importance: The pathogen mainly attacks beet seed crops, but is rarely of economic importance in industrial beet cultivation.
Control: Due to the low losses caused by this disease, it is not worthwhile controlling. The disease can be seed borne and all beet seed is treated with Thiram as a protection.

KWS