UKTC Archive

RE: Walnut tip damage

Subject: RE: Walnut tip damage
From: Paul Barton
Date: May 19 2020 11:04:37
Thanks Kevin (and others!),

I didn’t know about the chambered pith, thanks. Every day is a school day!

Paul.
On 19 May 2020, 11:28 +0100, Kevin Slezacek 
<KevinSlezacek@xxxxxxxxxxxxx.com>, wrote:
Hi Paul

We had some cold nights last week that resulted in air frosts and Ive 
noticed quite a bit of frost damage to fresh young growth. That’s what that 
looks like to me? These late frosts are most damaging particularly to late 
leafing species as they don’t harden off for some time.
Walnut has a chambered pith anyway so isn’t solid is that what you mean?

Kind regards,

Kevin Slezacek
-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
<uktc-request@xxxxxx.tree-care.info> On Behalf Of Paul Barton
Sent: 19 May 2020 11:17
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Re: Walnut tip damage

Attempting to resend the below message with smaller photos.
On 19 May 2020, 11:15 +0100, Paul Barton <paul@xxxxxxxxxxxxx.co.uk>, wrote:
Hello hive mind,

Last summer I noticed a number of common walnut trees with blackened 
leaves and dieback throughout the crowns. In some cases the pith had been 
hollowed out near the tips. I didn’t work out what had caused it then.

This year I’m also seeing dead black tips, but it looks very like frost 
damage. See attached photo.

Is anyone aware of a particular pest or disease that would do this, or is 
it simply frost? There were a couple of cold nights last week...

Kind regards,

Paul Barton
MSc, BSc (Hons), TechCert (ArborA), MArborA Registered Consultant of
the Arboricultural Association

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