Leak

Leak, also known as water rot, causes spongy, wet internal rot of tubers. The diseased flesh is clearly demarcated from healthy tissue by a dark boundary line. In advanced infections, hollow cavities form and all that remains of some infected tubers are tuber shells with thin papery skins.

• Reference: http://www.ipm.ucdavis.edu/PMG/r607100411.html

Presence among species

Pathogen	Susceptible Host
Andean potato mottle virus	Aecidium
Pythium ultimum	Solanum tuberosum