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[Jwlehman@aol.com]

In a message dated 3/26/2012 10:46:11 PM Eastern Daylight Time, 
sdw12986@aol.com writes:

> A friend has a wild pear (pyrus spp.) that bears inedible fruit.  To
> >help him out, I grafted scionwood from my pears onto his wild pear.  His
> >tree accepted all of my grafts.  Several of those grafts were from my Ure
> >Pear.  When I saw the abundance of edible fruit on his tree, I grafted 
> his
> >wild pear scionwood onto my Ure but the Ure rejected all grafts.  That is
> >curious:  How can scions be accepted onto a tree whose scions are 
> rejected
> >by the other?  I guess that is one of the mysteries of Nature.
> 

Hello Jim,

Remember from the graft point the new plant has its own genetics. And a 
virus could also be involved. 

Within chestnuts there are two distinct groups that are not compatible as 
understocks and by testing it can be determined which seedlings will accept 
certain varieties. This was written up by Dr. Sandra Anagnostakis. So if 
there is an absence of a rejection compound in the understock the Ure pear is 
accepted. But if the Ure pear genes generates a rejection compound it could 
reject the wild pear. 

So if Ure is grafted onto the wild pear w/o the rejection compound it 
lives. But if the genes in Ure generates a rejection chemical it could reject 
the 
same understock it is grafted to. 

Make sense?

Jerry
>From quirky@videotron.ca  Tue Mar 27 08:25:51 2012
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Date: Tue, 27 Mar 2012 08:25:42 -0400
From: Caren Kirk <quirky@videotron.ca>
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Subject: Re: [nafex] Early pruning
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  Hey Steve,

This morning had to bundle the kids up in full snow suits that they 
haven't worn for about 3 weeks. Even they were happy to put them on!

Feel like a doofus for pushing some of the mulch away from  some of my 
plants last week. Probably sentenced them to a death if not severe damage.

At least the wind has died down here. With the sunshine it actually 
looks quite beautiful out. Shame it's -10 deg C!

Steve, as you said, we'll just  have to see what survives and whether we 
get any fruit at all!

Courage!

Caren.

On 3/26/2012 10:31 PM, Steve wrote:
> I'm not covering anything. It's going to be too cold and too windy to
> make any difference. Every time I check the forecast, it looks worse.
> When they were predicting 12 degrees, I figured it was early and maybe
> it wouldn't end up being nearly that cold. No such luck. Here's what the
> national weather service has to say, now that Monday night is here:
>
> "Clear, with a low around 3. Wind chill values as low as -8. North wind
> between 6 and 10 mph, with gusts as high as 22 mph."
>
> Those are Fahrenheit temperatures, of course. The only "precaution" I
> took was to pick the daffodils that were in bloom and those showing
> color in the buds. I fully expect that flowers, leaves and everything
> will be killed to the ground. I really don't know what it will do to the
> fruit trees. What a spring.
>
> Steve (in the Adirondacks)
>
>
> On 3/24/2012 11:04 AM, Caren Kirk wrote:
>>     Steve,
>>
>> As far as this list goes I'd say we're neighbours!
>>
>> Did my pruning yesterday, there was a lot more green on the cuts than
>> usual although the buds were all still tightly closed.
>>
>> Strange insects about with the warm weather, worried that could be a new
>> problem.
>>
>> Not worried too much apart from the apricot, can't do much about it anyway.
>>
>> I am going to vigilantly monitor the precipitation though.  A couple of
>> years back we had a very dry, warm spring and I lost a couple of young
>> plants (including a young apple tree) and I strongly believe it was
>> through lack of water during the spring (never thought to water in
>> spring here previously). With the rapid melt and warm weather I feel it
>> could go that way again. But who know, it could rain all next week!
>>
>> Good Luck for Monday, I've had a success protecting plants in the autumn
>> with sheets and blankets, don't know if that's a viable option for the
>> scale of your fruit production or if it even works in spring.
>>
>> Caren
>>
>> On 3/23/2012 12:13 AM, Steve wrote:
>>> We live fairly close to each other. You could drive to my house is less
>>> than 3 hours. After mid to upper 70s all week, I see the forecast low
>>> for Monday night is 12 degrees F (about -11 C). The apples and American
>>> Hybrid plums are showing green tips on the buds. The pears and European
>>> plums mostly are not showing green.
>>> Apples are so forgiving, I bet they will be OK. I'm not so sure about
>>> everything else.
>>>
>>> Steve in the Adirondacks
>>>
>>>
>>> On 3/22/2012 1:49 PM, Caren Kirk wrote:
>>>>       Steve,
>>>>
>>>> I'm suffering the same weather pattern as you with astonishingly warm
>>>> weather beating all  existing records by over 10 degrees C. Weathermen
>>>> say that it'll be over tomorrow but I'm stressed about getting my
>>>> pruning on the go all the same.
>>>>
>>>> The yo-yo temperature pattern we experienced this winter seem to be
>>>> continuing. I wonder how it will affect all my fruits.
>>>>
>>>> Caren Kirk
>>>> St. Jerome QC
>>>>
>>>> On 3/19/2012 10:24 PM, Steve wrote:
>>>>> On 3/18/2012 10:22 PM, Steve wrote:
>>>>>> On 3/18/2012 2:34 PM, sherwin wrote:
>>>>>>> On 3/18/2012 12:49 PM, Steve wrote:
>>>>>>>> I'm thinking of going out and starting my pruning. It may not seem 
>>>>>>>> early
>>>>>>>> to some of you but it's early here. I usually wait until late April 
>>>>>>>> when
>>>>>>>> the chance of real cold weather is mostly over. I just checked and 
>>>>>>>> our
>>>>>>>> normal high and normal low for this date is 37 and 14 degrees F.
>>>>>>>> Today it's already 70 degrees and the lows for the rest of the week 
>>>>>>>> are
>>>>>>>> in the 40s. I think I'm going to start pruning, at least the apples,
>>>>>>>> right now, even though it could easily get into the single digits on 
>>>>>>>> any
>>>>>>>> given night for the next 3 or 4 weeks.
>>>>>>>> Does anyone think this is a mistake? Apples are pretty forgiving but
>>>>>>>> what about my pears and plums?
>>>>>>>>
>>>>>>>> Steve in the Adirondacks
>>>>>>>>
>>>>>>>              Steve,
>>>>>>>
>>>>>>>              As far as I know, the main requirement for pruning is 
>>>>>>> that the
>>>>>>> tree is dormant.
>>>>>>>              Otherwise, you are going to encourage more growth by 
>>>>>>> pruning an
>>>>>>> actively
>>>>>>>              growing tree.  So it all depends on how soon you can get 
>>>>>>> out to
>>>>>>> prune, weather
>>>>>>>              permitting.  With all this warm weather, if your trees 
>>>>>>> have
>>>>>>> already woken up, you
>>>>>>>              may want to postpone your pruning, or at least limit it. 
>>>>>>>  Cold
>>>>>>> weather should not
>>>>>>>              bother a freshly pruned tree.
>>>>>>>
>>>>>>>                          Sherwin Dubren in Illinois
>>>>>> The trees are still pretty dormant, very slight bud enlargement at the
>>>>>> very most. Actually, summer pruning would encourage less new growth, 
>>>>>> but
>>>>>> I'm not really worried about any of that on the apples.
>>>>>> I was more concerned about a sudden return to very cold weather causing
>>>>>> extra die back at the pruning cuts. Also some concern about the pruning
>>>>>> cuts being open longer since there may be no growth to start closing
>>>>>> them until May.
>>>>>>
>>>>>> Steve
>>>>> I'm going to add that the high today was 73, the record high for the day
>>>>> (until now) was 63, and the record low for this date is 19 below zero.
>>>>> Normal low is 15 above zero. It's going to feel like a real insult
>>>>> when/if the temperatures return to normal.    Steve
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