The American botanist, plant physiologist, oenologist and vine grower Dr. Harold Paul Olmo (1909-2006) studied at the University of California in Berkeley Horticulture and Genetics. Towards the end of the American prohibition he was appointed professor of vine science to the reactivated Department of Viticulture and Enology at the University of California at Davis in 1931 and headed by Albert Julius Winkler (1894-1989) with the task of new breed entrusted with grape varieties. He subsequently developed into the leading vine geneticist of his era. Until his retirement in 1979, he created several thousand new varieties, around 30 of which were included in the national variety lists.
Olmo completed this by the US physiologist Maynard A. Amerine (1911-1998) created herbarium with many grape varieties that were grown in California and worldwide between 1930 and 1980. He imported hundreds of varieties from Europe (Greece, Portugal, Spain) and the Middle East and made numerous attempts to develop documents and the breeding of hybrids by. Olmo recognized the enormous potential of the American vine species Vitis rotundifolia resilience to various vine diseases and especially their more complete ones Phylloxera resistance,
The new breeds he created were among others Blush Seedless. Calzin. Carmine. Carnelian. Centurion. Christmas rose. Dawn Seedless. Delight. Early Muscat. Emerald Riesling. Emerald Seedless. flora. Niabell. Perlette. Red Globe. Royalty. Olmo grapes. Ruby Cabernet. Ruby Seedless and Symphony, He introduced many of the varieties used in California today, for example the Syrah in 1936. On behalf of the United Nations, he worked on numerous projects related to food and agriculture organization. Last but not least, he was involved in the development of the first mechanical harvesters.
Through his extensive travels in Australia, South America, Europe, India, Afghanistan and Iran, he received the designation "Indiana Jones of viticulture". The extensive consulting activities in his special discipline were also appreciated worldwide. Olmo has received numerous awards and medals for his services to viticulture, such as the Pope, the American Pomology Society (fruit growing association) OIV and the UN. In retirement, he continued to deal with the topic of vine breeding.