[NAFEX] Asian/American Plums
dwoodard at becon.org
Mon Nov 17 20:19:08 EST 2008
One additional factor:
I've been told that Kahinta (a hybrid plum I believe) takes 8 years to
come into full bearing, or to bear at all (my recollection is not clear
over 20 years or so).
Also, about 20 years ago a local Niagara Peninsula fruit grower told me
that Vanier (named by Vineland, Ottawa-bred, reportedly Japanese/Prunus
salicina, reportedly a Burbank seedling, I don't know whether
open-pollinated or not) while it starts bearing around 4 years or so,
does not come into full bearing (in relation to tree size) until about 8
years old. I think this would be on Myrobalan rootstock.
I suspect that these days a lot of people draw conclusions before a tree
is 8 years old, when perhaps they should wait for maybe 10 years.
St. Catharines, Ontario, Canada
John Bunker wrote:
> I agree with Jim that most of what has been written in books (and there
> hasn't been much) about hybrid plum pollination is inaccurate or just
> copied from someone else. However, there is some good stuff out there,
> including FA Waugh's Plums and Plum Culture, written in 1901. I have
> read and re-read many times the Saskatchewan article to which Melissa
> refers. I consider it to be the best attempt yet at an intelligent
> explanation of plum pollination.
> We have about 40 hybrid plum trees on our farm in central Maine,
> including most - but not all- of the common ones and several that are
> more rare. We grow them in clusters of 3-12 trees, with trees spaced
> about 3-6 feet apart. Until we planted straight species (P. americana)
> we got fruit, but never had great crops. Out best years have all been
> since the species have begun to flower.
> This is still anecdotal evidence however. This year in central Maine,
> many growers had huge crops, seemingly no matter what they did or didn't
> do. And of course, in many areas there is the issue of plum curculio
> which may (or may not) play a key role in cropping.
> Some factors that may effect pollination include:
> Unlike P. domestica and a number of other Prunus species, hybrids are
> thought to be not self-fruitful.
> Hybrid plums are obviously hybrids and as hybrids, they have reduced
> amounts of viable pollen. (Think mules.)
> Hybrid plum varieties have differing flowering periods from one another,
> not always overlapping.
> The timing of what viable male pollen there is in hybrid plums does not
> necessarily correlate with female receptivity in neighboring trees.
> There are several different species combinations that fall under the
> banner of "hybrid plum". Some of those combinations are known, some
> guessed at, some unknown. Some even exhibit "European" type
> characteristics and/or susceptibilities.
> Superior is a plum with an odd history. While the literature generally
> calls it: Burbank (P. salicina) x Kaga (P. americana x P. simonii), in
> the old catalogs (30+ years ago) I have seen Superior referred to as
> both a hybrid and a European.
> Unfortunately, breeders and nurseries pretty much gave up on hybrid
> plums decades ago, for what ever reason. As such, a good deal of what's
> floating around may or may not even be correctly identified. The best
> source of a variety is a grower who knows the fruit and has bearing
> trees. That's one of the beauties of grafting your own. If possible, I
> always "go to the tree" when I want to add to the collection.
> With best regards,
> John Bunker
> trees at fedcoseeds.com <mailto:trees at fedcoseeds.com>
> PO Box 520
> Waterville ME 04903
> fax: 207-872-8317
> On Nov 17, 2008, at 4:30 PM, Melissa Kacalanos wrote:
More information about the nafex