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Old December 29, 2017   #8
Labradors2
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Join Date: Jul 2013
Location: Ontario
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Quote:
Originally Posted by loulac View Post
I wouldn't leave such an open wound untreated, lots of germs will fall on it. I suggest a coat of black lquid tar sold for that purpose (I can't suggest a U.S. brand). If you insist on remaining 100% organic you can lay a thiick coat of clay on the wound. I hope Linda won't mind my giving an opinion different from hers !

all the best
There has been some new thinking on the subject of pruning sealer. Here's one blurb that I found:

http://aces.nmsu.edu/ces/yard/2001/021001.html

"Many pruning sealer compounds are black and contain asphalt. This black material absorbs our New Mexico sunlight and becomes quite hot. The heat can kill the tender cells that the tree produces to close the pruning wound and in that manner delays wound closure and compartmentalization. Lighter-colored materials do less damage, but any containing a petroleum-based solvent can damage newly developing wound closure cells.
Scientific research has shown that the pruning sealer is not necessary. Much more important is proper pruning technique. "

Hope this helps,
Linda
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