Beet curly top is a highly destructive disease which is widespread throughout the western United States.
Occurs to some degree annually wherever sugarbeets are grown In North America and is most common in Idaho, Washington, and Oregon.
This fungal disease can occur in any sugar beet market in North America but it is most prevalent in the central growing areas of North America from Michigan to Colorado
Ramularia affects sugarbeets primarily in cool, damp climates.
The beet serves as a host to the bacteria, and it is transmitted by the seedling. This bacteria can cause seedling blight on young plants. It is been observed mainly in the western production areas of the United States.