[NAFEX] FB resistant pears

Richard Harrison rharrison922 at yahoo.com
Fri Jun 19 15:42:08 EDT 2009


Dr Natelson,
    I enjoyed your pear report and nice to hear from you. It's been a long time since I've seen much of you(except the last SFF meeting). Are you planning on attending the SFF meeting in Abbeville?
    I have several trees of Bartlett in different strains(last time I looked). I had Red Bartlett, regular Bartlett, and some I don't recall. Some of them didn't produce much some years. Others produced pretty well some years, but fruit was poor quality. Tenn does pretty well most years, but not all. We probably get 200 chill hours more here than you do in Houston area. Chill,for the most part I'd say, is not a big factor here in low production--although it does have some effect. We have RLB that affects pear quite a bit causing dieback. Most of my trees I grafted onto Calleryana about the early 1980's. Many came from the Southern Oregon Experiment Station.
                                                   Kind Regards,
                                                   Richard Harrison, NW FL

--- On Fri, 6/19/09, Natelson, Ethan, M.D. <ENatelson at tmhs.org> wrote:


From: Natelson, Ethan, M.D. <ENatelson at tmhs.org>
Subject: Re: [NAFEX] FB resistant pears
To: "North American Fruit Explorers" <nafex at lists.ibiblio.org>
Date: Friday, June 19, 2009, 2:14 PM








Donna,
 
     We cannot grow classical Bartlett pears in Houston , but do have many other varieties that simulate named quality pears, but have lower chill requirements.  We have the Southern Bartlett, which looks like a Bartlett , which is why Travis Callahan gave it that name.  It is a chance seedling from southern Louisiana but does not speak French.  It has good size, heavy bearing, good fireblight resistance (not quite as good as Tenn ) and has an excellent flavor on a fairly large spreading tree on P.calleryana rootstock.  It is the favorite pear of birds during the day and tree rats in the evening.
 
                                                                                   Regards, Ethan 
 




From: nafex-bounces at lists.ibiblio.org [mailto:nafex-bounces at lists.ibiblio.org] On Behalf Of Richard Harrison
Sent: Friday, June 19, 2009 1:21 PM
To: North American Fruit Explorers
Subject: Re: [NAFEX] FB resistant pears
 





Donna,

     I think I have Morgan---I went for a lot of those TN varieties like the one called ' Tenn ". It is soft and fairly low chilling. One of the lowest chillers we have is the old Asian 'Pineapple'.

     I never had fireblight for maybe 20 years until a cold wet Spring brought it on. It probably affected every variety to some extent---some worse than others.

                                                                  Richard

--- On Fri, 6/19/09, Kieran &/or Donna <holycow at frontiernet.net> wrote:


From: Kieran &/or Donna <holycow at frontiernet.net>
Subject: Re: [NAFEX] FB resistant pears
To: " North American Fruit Explorers " <nafex at lists.ibiblio.org>
Date: Friday, June 19, 2009, 12:36 PM


Richard,    

    You can actually grow 100 varieties of pears that far south?  I get the impression that a lot of them simply don't get enough chill hours to bloom that far south.  As for growing Bartlett at all, I am baffled that you and Ethan mention high quality pears that I've never dreamed of trying to grow here.  David Lockwood, UT's horticulture expert, says he's never seen a Bartlett tree here more than 4 years old.  I really don't hold out too much hope for some of the varieties I've ordered, I just wanted to see what they were like before they died, and I didn't know any other way to go about it.  

    The UT pear program would check for resistance in seedlings by grafting a branch of Bartlett onto each tree, and then inoculate the Bartlett with FB.  If it stopped spreading when it met the hybrid, the seedling was considered resistant.  Morgan is apparently one of the few Bartlett seedlings ever produced that is truly resistant.  Studies showed that if parents that had at least some degree of resistance they produced more resistant seedlings.  Donna 

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