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Potato tuber blemishes: understanding & diagnosis

Cracks and deformations

There are many causes for tuber cracking and deformations and establishing the cause is not easy. It is admitted that some symptoms are due to either abiotic factors ( humidity, temperature, phytotoxicity, etc...) resulting into physiological reaction, or  due to pathogens (fungi, viruses, etc...) resulting into diverse symptoms such as cracks and/or deformations.

Click on pictures to discover the diversity of symptoms and their potential causes.

Symptoms due to abiotic factors

Symptoms due to biotic factors

Other cracks
Deformations
Pathological deformation 200