What's this on ash pls

[kev7937]

 

I was hoping for my first sighting of dieback but the leaves seem to be undersized in the affected sections rather than wilting.

 

Any help pls.

[kev7937]

Anyone?

[Steve Bullman]

no idea sorry.  ruled out drought or mechanical damage?

[Mark Bolam]

I would say it is Chalara, but maybe with something else in the mix.
Pretty weird.

[Khriss]

Just dysfunctional tissues affecting development and som bacterial issues too, I would say , K

[timbernut]

With the lesions round the lateral branches it looks like chalara, most of the coppice regen and young plantation plants round here look like this.

[john k]

That looks like Chalara to me. Those lesions and the reddish brown discolouration are typical.

The effect of the disease is cyclic, with multiple infections causing a cumulative effect over a number of years. Infected areas die back but in the early stages don't have much impact on the overall health of the tree. Over successive seasons the tree will tend to get reinfected, with more and more of the canopy showing symptoms.

The black wilted leaves are only seen on newly affected growth, but I think that what you are seeing is poor growth from a part of the tree previously damaged by Chalara.

[kev7937]

Thanks, thought I'd def found some at last but the leaf bit threw me off.

I'll stick with chalara unless any better suggestions come up.