[NAFEX] bark damage-- recap.

tanis cuff tanistanis at hotmail.com
Sun Dec 11 10:27:11 EST 2005

Graet info, HB, but I had arboriculture classes too, and I don't see the 
memory trick you describe as being easier than "Phlo-up" & "xy-down".  (One 
way being wrong, but fortunately both being forgettable.)

For those who would remember these, and in many years of using arboriculture 
principles I've never used these terms other than here and in classrooms, 
how about this:  When you dig thru the bark, you hit the phloem before the 
xylem.  This works whether you alphabetize the printed words or their 
phonetics.  I for one have always been able to remember which is upward 
transport & which is downward -- THAT makes sense!

Also good to remember is at **** below.  Best not to cause injury, including 
pruning, "when leaves are forming or falling."

----Original Message Follows----
From: Heron Breen <>
To: North American Fruit Explorers <>
Subject: Re: [NAFEX] bark damage-- recap.
Date: Sat, 10 Dec 2005 21:50:57 -0600

yep, easy trick from arboriculture class:
xy-up! (xylem=zy-lem phoneticly)
Most woody plants can heal a wound down to but not through the cambium, as 
long as
the cambium does not get scorched by excess heat/light. Luckily most 
occurs during our colder spells here in Maine. The cambium will readily 
build new
phloem, but the level of stress that the tree endures has much to do with th 
in its yearly cycle in which the wound occurs. ****During and immediately 
flowering and first leaf are bad times for wounds of any type, as well as 
through November...

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