The viticultural expert Prof. Ing. Vilém Kraus (1924-2013) is considered the most important Czech viticultural expert of the 20th century (his son of the same name was a winemaker and died already in 2004). He studied agricultural and forestry technology as well as agriculture in Prague. For a large part of his life he worked at the Mendel University of Agriculture and Forestry, researching and breeding new grape varieties and rootstocks. Either through himself or his team, many new grape varieties were created. These included Arolanka, Cerason, Erilon, Fratava, GM 6493 and GM 6494, K1 (rootstock), Kofranka, Laurot, Malverina, Marlen, Nativa, Neronet, Rinot, Rondo (basic variety), Rubinet, Savilon, Serena, Sibera and Vesna. In the 1980s he developed the vine training Vertiko.
For me, Lexicon from wein.plus is the most comprehensive and best source of information about wine currently available.Egon Mark
Diplom-Sommelier, Weinakademiker und Weinberater, Volders (Österreich)