Help with diagnosis

[guymayor]

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took down a large Beech today (copper). It had canker all over one side of it. Half the tree was dead and failing in the yard. Sad to see them go.

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Yeah it is. If the full treatment now can prevent the canker spreading, maybe you can prune that tree for the rest of your life, instead of removing it once.

Phytophthora citricola Can be suppressed by calcium or gypsum fert and killed by surgery and heat. Sinclair/Lyon Diseases of Trees and Shrubs (buy it today!) p 356.

 

[Tree_Wizard]

An "off label" treatment we have successfully used on various beech cankers is: scribe the canker, remove all bark over the canker and paint the entire area with Arbotect. While not having 100% success we are probably close to 95%. Sometimes you have to do it 2 or 3 times. Also works great on nectria cankers on honeylocust.

 

[guymayor]

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we are probably close to 95%.

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Thanks for sharing; those are good results. I'd rather experiment with that than a blowtorch. /forum/images/graemlins/mad.gif