By Kevin Irvin
This information was taken from the following website: http://www.uga.edu/fruit/plum.html
There seems to be some confusion on what to call Prunus salicina, Japanese or Manchurian Plum? What do you call it? The two names Japanese and Manchurian have been inner changed quite frequently, so let me help clarify why this is so and also provide information on Prunus domestica and other species of Plum.
Since plum scions are genetically diverse, many different species/selections are used as rootstocks. In the USA, Myrobalan 29C (Prunus cerasifera) and Marianna 2624, a hybrid between ‘Myrobalan’ and a Native American plum, are used most frequently since they are widely compatible with most cultivars. Myrobalan 29C produces large trees with slightly delayed ripening, and is not particularly resistant to diseases or other root related problems. Marianna 2624 produces a somewhat smaller tree with slightly earlier ripening, and is resistant to a number of problems confronting other stocks.
California is the primary growing area of most Plums in the U.S.A. mainly because the climate is favorable for reduction of disease and fruit cracking.
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