[CANUFNET] green ash decline

[Stephen Smith]

Perhaps it's the natural cycle of climate that created the prairies in the first place acting itself out. Wouldn't be too many trees there naturally would there?

If they are planted street trees they are probably the mass-produced cultivar that is sold everywhere in NA, probably originating somewhere in the mid US.  May not be hardy there in the rougher years.
 
Stephen Smith
Urban Forest Associates Inc.
Urban Forestry and Ecological Restoration
www.ufora.ca
  ----- Original Message ----- 
  From: Elaine Johnson 
  To: 'Canadian Urban Forest Network' 
  Sent: Tuesday, June 29, 2010 3:49 PM
  Subject: Re: [CANUFNET] green ash decline


  We are seeing the same thing here in Red Deer.  In late September some Green Ash were still leafed out when the temperatures plummeted.  We observed many trees holding dead leaves over winter. To compound the problem, we've received little precipitation in the fall and little snow cover over the winter.  This spring was hard on our trees too.  In April the temperatures were really mild until the end of the month when the temperatures dipped going into the beginning of May.  Many Aspen poplar that were leafed out during this time period, suffered a bit of frost damage.  I would agree that it is abiotic.

  June is Recreation & Parks Month.  How do you live it everyday?  
  We want to hear from you throughout the month of June!  
  Email your recreation, parks and culture experiences to rpc at reddeer.ca. 
  You'll automatically be entered to win a prize package valued at more than $1,000. 
  Elaine Johnson 
  Urban Forester 
  Parks Planning and Technical Services 
  City of Red Deer 
  (403) 342-8344 


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  From: canufnet-bounces at list.web.net [mailto:canufnet-bounces at list.web.net] On Behalf Of Boone, Jeff (IS - Parks)
  Sent: June 28, 2010 12:53 PM
  To: 'canufnet at list.web.net'
  Subject: [CANUFNET] green ash decline

   

  In Saskatoon, many of our green ash are struggling this year.  We are seeing many trees with portions of the mid and upper crown dying and often the lower crown is struggling to leaf out.  In some cases the trees have not leafed out at all.  The damage is widespread throughout the city.  The trees are of mixed age but many are well established.  I'm wondering if other prairie cities are seeing green ash fail to leaf out with significant dieback in the crown.  

   

  We suspect the cause is abiotic.  Not sure if this is part of the story but we had very unusual Fall weather.  We had an early snow fall in October, exceptionally warm weather in November and then a very sudden drop in December with no snow cover.  We also had two weeks of warm weather in January.  

   

  Any suggestions are appreciated.

   

  Thanks

   

  Jeff W. Boone

  Entomologist B.Sc. M.Sc 

  (306) 975 3466

  (306) 220 5368 (cell)

  1101 Ave P N

  Saskatoon SK

  S7K 0J5

   


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