Re: deciduous tree growth -question

HI Paul,

Yes, I do have access to a plant pathology lab at a local university and I 
may use it once I've checked out the other elms around. There are  
deciduous trees of various sorts growing on the property and a few of 
those are looking ill at ease although I think they were ok last year. Yes, 
the problem does seem to be fairly uniform over the whole plant so 
induced dormancy may well be an issue. Do any trees set a finite number 
of leaves for next year as they move into dormancy in the fall do you 
know?

thanks

Terry Dowdeswell
692 Brunswick Road
RD1
Wanganui
New Zealand
~~~~~~~~~~~~~~~~~~~~
terry@delphinium.co.nz
http://www.delphinium.co.nz
~~~~~~~~~~~~~~~~~~~~

> Dormancy in most trees in induced by light duration and sometimes by
> temp. If your leaf problem is uniform over the entire plant it might
> just be induced dormancy.  If the problem starts in one area of the
> plant and then spreads its most likely a pathogen. A good number of
> trees lose there leave in late summer here in the North do to
> pathogens instead of dormancy -- its part of the normal process. 
> Native plants seem to suffer more pathogen problems than non native
> plants. 
> 
> Maybe their is a university there with a good hort program that can do
> a culture of the leaves to see if its a pathogen. 
> 
> Paul
> 
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