Nectria Canker

[Basswood]

Been running into a fair amount of presumed Nectria canker lately. I’m curious to see what some of you all have found as far as treatment goes if anything. My current recs are just soil care and cultural.

 

[evo]

What sub species. Cinnabara (spelling?) isn’t too big of a deal. I have seen it become pathogenic but it’s very common as a saprophytic thang. Often colonizing very recent dead.
A good sanitation pruning when it’s not sporulating and thinning. It seems to really like humidity and straight up wet.
Some of the other species seem to be more aggressive. But I treat them as I would nearly every other twig or branch canker.
See if you can correct any site conditions and improve air circulation.

 

[moss]

Wild black birch (Betula lenta) has been hit hard by Neonectria ditissima "Target Canker" in my area eastern Massachusetts. Trees keep on keeping on in the forest where cultural conditions are optimal for the tree (as opposed to yards where root zone conditions are typically not optimal) but eventually become structurally compromised.

https://ag.umass.edu/landscape/fact-sheets/target-canker-of-hardwoods

-AJ

 

[Basswood]

Yea not sure of the specific species. Didn’t realize it varies so much.

 

[cody willard]

Our water and willow oaks get hammered in Tulsa. Huge target cankers decades in the making. I did a tree a month ago that pretty much had rock climbing holds all the way up.

It is a disease that can be spread by pruning tools.