fungus and found it very helpful. But I
was wondering if you could provide some added insights.
Q. I live in zone 5B (Montreal, Quebec, Canada) and I planted a
“chum” (cherry plum cross) tree a month ago in my backyard. I believe it is stricken with shot hole
fungus (see following video: http://www.youtube.com/watch?v=hs6jPVWP0-w&feature=youtu.be). As you said in your video I will only apply a Bordeaux
Powder after the leaves fall in the autumn but I was wondering if there was
anything that you recommended that I could do now to prevent the spread of the
disease throughout my tree and prevent the fungus from spreading to my
neighbouring fruit trees/plants (asian pear, european pear, raspberry, grapes,
strawberries)?
Should I remove and burn
all foliage that is stricken with the fungus? No it’s a mix of cherry and plum
(prunus besseyi x prunus salicina). Perhaps it is a physiological
disorder then. I can remember we used to
have a large tree that was planted in the same spot as my chum tree and it
always prematurely lost it’s leaves come late summer or early fall. Other trees all had their leaves but it lost
it’s leaves well before the other trees. In the end we removed the tree. But I’m wondering if perhaps it is something
that is in the soil. I know the soil is
quite tough in our backyard and is more of a clay soil. Not sure if that provides any valuable
insights.
wholesale fruit nursery for thier comments.
understand is that plums seldom if ever get shothole disease. They get holes in their
leaves but my understanding is this is physiological and not pathological in
nature. Holes from shothole fungus should be rimmed with a purple or brown
margin. When they occur physiologically then are not rimmed with any color but
may have a crispy brown edge rather than any color.
Response From Maxwell:
is possible. The non-infectious shot hole disorder on plum develops in
late spring, beginning on older leaves and progressing out the shoot. Small translucent spots turn brown and fall
out. There is no treatment.
tattered. No treatment for that either.
From Tom Spellman:
Plum that seem to fruit in all climates. The fruit is about the size of a
quarter or slightly larger. They have fruited successfully in all zones from 3
to 9 and the fruit ripens July through September depending on how far north you
are. They have a balance just slightly toward the acid side and are quite
flavorful when tree ripe. They are interfruitful and will also pollinate with
other Japanese Plums and Pluots. We offer them as single budded trees and also
as a two in one with both varieties grafted to one Citation rootstock.
cross named “Pluerry – Sweet Treat”. Don’t yet have much information
about zone adaptability but I’m hopeful its low chill as the fruit is
delicious. In the central valley it fruits from mid July through August.
Requires another Japanese Plum or Pluot for cross pollinization. I strongly
feel Burgundy Plum and Flavor Grenade Pluot will work well. We are releasing it as 500 chill hours
recommended. However with the Plum parentage it could be much less. This is a
great variety for experimentation. I
have recently planted two to my orchard and have it in a test plot in south Orange
county.