Effect of soil temperature on potato ring rot

Abstract

Foliage symptoms of bacterial ring rot of potatoes appear much earlier and are more severe at a soil temperature of 25 C than at 16, 19, 22, 28, 31, or 34 C. Percentages of tubers infected is about the same at temperatures between 16 and 28 C. In cold climates this could result in the spread of the disease without its detection in the field.