In the absence of harmony between the biology of the variety and the environment, the physiological functions of the body are disrupted, which leads to a weakening of its viability, depression and, finally, to a significant decrease in the productivity and quality of planting material. Therefore, for seed production of each variety, the optimal growing zones and certain dates for the variety renewal of the planting material must be selected. The availability of good varieties is not enough for successful potato growing. A prerequisite at all stages of growing seed material is strict adherence to the requirements of potato seed production, which should ensure for a long time not only the preservation, but also the improvement of the valuable qualities of the variety. Insufficient attention to seed production leads to such dire consequences as the spread of various diseases on potato plants, a rapid decline in yield, and the release of the variety into circulation. One of the main tasks in potato seed production is the fight against viral diseases. Their widespread occurrence on potato plantations is most often the main reason for the poor quality of seed material. Therefore, growing seed potatoes free from viral infection is a key prerequisite for ensuring proper seed quality. This is the most difficult task, but not the only one. Seed potatoes must also be completely free from numerous other diseases – fungal and bacterial. It is inadmissible to infest it with dangerous quarantine diseases, such as potato cancer, potato nematode, etc. Seed potatoes must have proper productive qualities and, with appropriate agricultural technology, give high yields. Tubers should be mainly of planting size, both very small and large are unacceptable. At all stages of seed production, it is necessary to create such growing conditions that would completely exclude varietal impurities. Their presence can ultimately lead to the loss of a valuable variety. In addition, impurities of different varieties can contribute to the spread of different diseases. All these tasks can be solved only with the systematic implementation of a well-thought-out and scientifically grounded system of seed production.
