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Is this a disease in my pear tree?

 
Posts: 23
Location: Northern pennsylvania, zone 5b
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My pear tree has these vertical fissures in the bark.  I pruned it way back a few years ago, and  I can’t tell if the fisures are just the transition from a small diameter branch to a large one or if they are a disease actually tearing the bark.
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41064BCD-22F3-4037-B7D0-721D35A75382.jpeg
[Thumbnail for 41064BCD-22F3-4037-B7D0-721D35A75382.jpeg]
 
Ryan ElSmith
Posts: 23
Location: Northern pennsylvania, zone 5b
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I have been looking at some images online and it may be a black rot canker.  Anyone have experience with this?
 
pollinator
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Location: Australia, Canberra
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I was thinking neem oil then I searched for "Black rot canker Michael Phillips" and this turned up

https://groworganicapples.com/phorum/read.php?51,1711,1711
 
Gurkan Yeniceri
pollinator
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Location: Australia, Canberra
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And here is a recipe thread for the tree paste her eon permies

https://permies.com/t/2890/Biodynamic-Tree-Paste
 
gardener
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Location: Western Washington
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It might be physical damage to the tree, and it may or may not have gotten infected after that. It looks pretty similar to trees I've seen that were injured when they were young by rabbits, rogue weedwacking, etc.
 
pollinator
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Location: Nevada, Mo 64772
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Old sun scald damage? Is it on the sunny side?
 
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