Professor Dr. Dr. Gerhardt Erich Alleweldt (1927-2005) studied agriculture from 1950 at the Justus Liebig University in Gießen, graduated in 1953 and received his doctorate in agriculture in 1956 (Dr. agr. Sci.). In 1956 he started working at the Institute of Vine Breeding Geilweilerhof in Siebeldingen-Pfalz (IRZ) under the direction of the then director of the institute, Prof. Dr. Bernhard Husfeld (1900-1970), after his death he took over the management in 1970 and held it until his retirement in 1995. From 1991 he became head of the Federal Institute for Breeding Research in Viticulture and Horticulture in Siebeldingen (Rhineland-Palatinate). Alleweldt held a number of other functions, such as chairing the German Vine Growers Association. At the Faculty of Agriculture at the Justus Liebig University in Gießen (Hesse), he received the license to teach "Plant production and plant breeding with special emphasis on viticulture and vine breeding".
Alleweldt dealt with fundamental questions of growth and developmental physiology in vines at an early stage. In the new breed of vine varieties, he specialized in mushroom-tolerant varieties resistance against harmful fungi such as the wrong and the real mildew, Among other things, he created the varieties Orion. Phoenix. regent (its most important product), Sirius and Staufer, Another focus of the scientific work was early diagnosis in order to increase breeding efficiency and shorten the long breeding period for vines. Furthermore, in the 1980s he laid the foundation stone for the extensive, worldwide unique internet grape database VIVC (Vitis International Variety Catalog). Alleweldt was awarded the Grand Cross of Merit of the Federal Republic of Germany for his special achievements.