POTATO CULTIVARS SUSCEPTIBILITY TO POTATO LATE BLIGHT (PHYTOPTHTORA INFESTANS)

The main aim of this research was to determine the susceptibility of Lithuanian selection potato cultivars to late blight.Late blight infection was different in potato groups with various maturities.In early potatoes disease spread was more intensive, and slower in late maturity cultivars.The intensity of potato blight spread in various maturity potato cultivars depends not only on their earliness, but their biologic traits as well.Late blight research has been conducted in the potato breeding program -for the creation of biological-mathematical prognosis models of late blight.Potato cultivar 'Aista' has high resistance to P. infestans.'Aista' is recommended for growing on ecologic farms.