Archimedes Plutonium wrote in message ...
I wonder if the apple cedar rust fungus is permanent to a apple tree if
it catches
it once. Or whether, if all cedar trees for a distance are removed, then
will the
apple trees formerly infected become uninfected with time. I understand
the
fungus has a two year cycle. To repeat my question, if an apple tree has

cedar rust, is it permanent or can it be eliminated by elimination of
cedar trees.

Archimedes Plutonium,
whole entire Universe is just one big atom where dots
of the electron-dot-cloud are galaxies

Archimedes,

I did some internet research on the topic, and the answer is yes, if
all cedar trees in a one-mile or two-mile radius of the apple trees
are removed, the fungus' life cycle will be interrupted and it will go
away in about two years.

The fungus is gymnosporangium juniperi-virginianae. It has a two-year
life cycle. The fungus passes part of its life on the cedar and part
of its life on the apple. By removing the cedars, the life cycle will
be interrupted and the fungus will eventually go away.

Other recommended steps include use of disease-resistant apples, and
use of fungicide. I am under the impression that you would prefer not
to use fungicide. If you have the option to plant a different type of
apple tree, Golden Delicious and Delicious are more resistant, and
ornamental crabapples and Jonathans are more susceptible. A nursery
could provide more information about specific resistant strains.

Best Regards,
-Kevin