The article describes the results of experimental work to determine the susceptibility of potato tubers to diseases during storage in a complex vegetable storehouse with forced ventilation. The potato variety Gala was taken as an object of research. The research was carried out in JSC Uchkhoz “Uralets” of the Beloyarsk CD of the Sverdlovsk region within the framework of the state task of the Ministry of Agriculture of the Russian Federation reg. No. 121092300056-9. As a result of experimental work, it was found that cultivation technology elements: feeding area, use of fungicides and storage parameters influenced the manifestation of diseases of potato tubers. The main diseases of tubers during storage are late blight, skin necrosis, Rhizoctonia blight, Fusarium blight, ring rot. An inverse correlation was revealed between the feeding area and the degree of damage to potato tubers, that is, the smaller the feeding area, the greater the degree of damage to tubers by diseases. The use of the fungicides shirlan and infinito was effective and reduced the degree of damage to 2-3%, with 5-7% at the control. In general, it was noted that in a complex vegetable storehouse with forced ventilation in all experimental variants, regardless of the fungicide type, an increase in the feeding area during potato cultivation reduces the incidence of tubers during storage.