Hello Guy
Many, many, years ago, when I was doing it Down Under, I encountered a
number of mortal encounters between indigenous trees and swimming pools. I
can particularly recall my first diagnosis which involved the death of a
magnificent Lemon-scented Gum (Eucalyptus citriodora), that was the
properties main feature tree located some distance from the swimming pool.
Initially, the symptoms were very puzzling - similar to road salt damage,
which is not what might be expected in the height of summer in a
Mediterranean climate - and it was only after some investigative work that
is was established that the owners new maintenance man had been discharging
the pool water within the root zone of tree. Once discovered this abiotic
causal agent was not uncommonly encountered. When I left, swimming pool
related damage was becoming increasingly common because of the rise in the
popularity of salt water swimming pools. A spectacularly fatal combination
with drought conditions, water shortages, and a parched garden.
With regard to chlorinated swimming pool water, which is saline, I would be
particularly concerned about it being discharged around Beech (Fagus
sylvatica) and Sycamore (Acer pseudoplatanus), which are considered to be
susceptible to soil salt damage. The Lime (Tilia sp) susceptibility
depends on which species you're dealing with.
Cheers
Acer ventura
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