UKTC Archive

Re: drought stress

Subject: Re: drought stress
From: Wayne Tyson
Date: May 13 2022 15:56:37
I don't know about the UK, but here in Southern California (Mediterranean
climate, where most domestic trees are dependent upon irrigation or seepage
from domestic water/sewage infrastructure), the water conservation
requirements of "our" drought have resulted in the decline and/or death of
large numbers of trees. I commonly probe the root zone of trees and other
plants to determine the presence/absence of *available* water. Available
water deficiency (wilt) shows up in most plants, especially alien species,
rather rapidly and obviously, but turgor pressure can be measured with
proper instrumentation, preferably by experienced personnel, which I select
via the Robin Hood Method.

WT

On Fri, May 13, 2022 at 1:26 AM Gareth Hare <Gareth.Hare@xxxxxxxxxxxx.gov.uk>
wrote:

Morning all. Re the above: in our locality we're seeing increasing numbers
of trees (particularly conifers it seems) dying or declining with no
defined cause. In two of the cases -one in Scots Pine and one in Larch both
involving large numbers of trees- Plant Health have been involved and have
not found any biotic cause. I'm leaning towards the delayed effects of
drought periods in the decline and death of these trees but wonder if
anyone else is observing similar?

Cheers

Gareth



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