10 Questions
What is the pathogen responsible for Ring Rot of Potato?
Clavibacter michiganense subsp. sepedonicum
What are the general symptoms of infected plants in the case of Ring Rot of Potato?
Symptoms are usually overlooked or masked by other diseases
What is the optimum temperature for the growth of Clavibacter michiganense subsp. sepedonicum?
20-29°C
What happens if a wilted stem is cut at the base in the case of Ring Rot of Potato?
It oozes creamy exudate out of the vascular bundles
What symptom is observed on the leaves and stems in the case of Ring Rot of Potato?
Yellowing of leaf veins with necrotic leaf margins
What are the symptoms of Ring Rot of Potato on the leaves and stems?
The interveinal areas of its leaflets turn yellowish, and the leaf margins roll upward and become necrotic. The leaves then begin to wilt, continuing until all the leaves of the stem wilt and the stem then dies.
What is the impact of Ring Rot of Potato on the crop yield?
Losses of up to 50% of the crop have been noted in severe infections.
Describe the appearance of the pathogen Clavibacter michiganense subsp. sepedonicum.
Creamy colonies, Gram positive, Non motile, Aerobic, round or pleomorphic rod, Non-spore forming.
When do the aboveground symptoms of Ring Rot of Potato usually appear?
Infected plants usually don't show aboveground symptoms until they are fully grown or the symptoms occur so late in the season that they are overlooked or masked by other diseases.
What symptom may appear in years with cool springs and warm summers in the case of Ring Rot of Potato?
In years with cool springs and warm summers, one or more of the stems may appear stunted.
Test your knowledge about bacterial diseases affecting potato plants, including ring rot and common scab. Learn about the symptoms, pathogens, and impact on crop yield.
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