For Love of
Trees – trees, hedgerows, ivy and the environment. Risteárd Mulcahy. Environmental
Publications. 1996 pp 79.
This book
was published 15 years ago. Because the ivy situation in Ireland has worsened since
my book was published I thought of republishing it in 2012 with some additional
comments which had been omitted in the first edition. I had the text added to
my computer by my daughter Barbara for this purpose. However, as the additions
I had in mind were hardly sufficient to merit a new edition, I thought a rider
would suffice which can be added to the early copies which I have left in my
library.
Struggling to breath in Ballymore Eustace |
I can say at this juncture that my book which was so critical of the excessive amount of Ivy on our hedgerows trees received a mixed reception; some agreed with my general thesis while others believed that ivy is not harmful to our casual and woodland timber; they even deemed it attractive when the tree is heavily laden. Those who agreed with my views, particularly on the aesthetic effect of a heavy growth of the plant, were rarely outspoken or active in discouraging its worst features. Others were entirely opposed to my view, some of whom expressed opinions denying its harmful and aesthetic effects. Some thought me obsessive in my opinions. In no case has there been any evidence provided to counteract my views about the harmful aesthetic and functional effect of the climber as it heavily envelops the trunk and branches of our hedgerow and small clumps of trees.
Both trees were freed of ivy 15 years ago. One is re-infested. |
I have no reason to change my opinions about the problems created by the widespread growth of ivy in Ireland. In my chapter The Mechanism of Damage by Ivy, I underline the plant’s roots competing for water and nutrients, and, through the gradual spread of the lateral branches, the loss of leaf production. We need to underline the loss of leaf production as is so evident when the climber has reached the top of the affected tree. It is clearly impossible for the tree to grow in a natural way if it is deprived of its leaves, its source of energy and carbon production. It is also obvious that the normal growth and habit of the tree is changed because of the gradual distortion and loss of the lateral branches.
I had no
idea in 1996 why the ivy infestation of our trees has been a very recent aspect
of our hedgerows and hedgerow trees. I had been familiar with the hedgerows in
Co. Wexford as a youth and recalled them as being rich in trees, and of ash in
particular. The reduction in ash
was evident 15 years ago and I can say with confidence that the ivy incursion
into our countryside has worsened during the last 15 years since I published my
monograph. I was not aware of the cause of the widespread presence of ivy 15 years
ago but since then I have found
evidence that goats are being used professionally in the United States to
control the spread of ‘’English Ivy’’ and many other forms of brushwood and
weeds. This information is available on the web under the headings of goats and
ivy. You can look up Rent-a-goat gains a foothold
and Fias Co Farm. Herds of goats are hired by
landowners and other institutions in the West Coast of America. The goats are
proving most effective in clearing brushwood and much more economical than
clearing scrub mechanically or by human hand.
Goats have
four stomach cavities and are notorious browsers of almost any plant or shrub
which they encounter. Goats were widespread in Ireland in the past but are now
rarely seen. It is very likely that they may have played a significant if not
the major part in the growth and spread of our hedgerow ivy. It is surely the
most rational reason we can attribute to the increasing and widespread
prevalence of ivy in our countryside.
Near my daughter Tina's home in France |
In my
chapter Methods of Control I describe the simple method of
control by cutting the ivy stems with a sharp saw, secateurs or hatchet, whichever
is most appropriate. It is clear however that when the tree is heavily laden
the thickness of the ivy stems and their multiplicity are such as to make it
more difficult to divide them, particularly when the base of the tree is
occluded by scrub and other hedgerow weeds and plants. This is a good reason to
attend to the tree before the climber has travelled too far in its journey to
the top.
The
classification of the ivies is very complex because of their huge variety and
their propensity to changes in morphology in response to many factors in the
environment. The Common Ivy is spoken about in the UK but the ivy in Ireland is
called Hedera hibernica and tends to be large leafed and invasive. Ivy is found as ground cover on the
continent but I had thought that it was only a problem for our trees and
hedgerows in Ireland and to a lesser extent in Britain. However I noted some
common ivy on the trees beside the railway line from Nantes to La Rochelle last
autumn but the plant was far from being conspicuous, and a friend who had been
in Portugal and is sympathetic to my views noted some ivy on the trees in
Portugal.
With my
wandering mind, wandering further with age, I find myself switching my mind without
obvious reason. In recent years I
have collected the nuts of our common and ever-green oaks and some fine chestnuts
during my walks in the nearby UCD grounds and in the spacious roads and avenues
of our nearby quiet suburb of Ardalea. This year’s plantings were in October of
last year. The plastic pots measuring ten to 15 centimetres were filled from my
wife’s spare garden soil. I
planted twelve evergreen oaks and twelve chestnuts in separate small pots and left
them to winter behind her tool shed. Although I did not see the first appearance
until early April (it was a chestnut) I enjoyed a certain feeling of
expectation of their arrival long before that date and found myself sneaking
out in the early morning and examining each pot carefully for signs of life. It
was a daily brief note of excitement during a cold and wet winter!
In Wexford, patiently waiting to be planted. |
The first
arrival of a chestnut tree in early April was quickly followed by others and
to-day at the beginning of May as I write this account I now have the twelve
chestnuts but no sign of the oaks. The first two chestnuts to appear measured exactly
20 centimetres (8 inches) by the 30th of April. I fear that my oaks
must have been infertile although in past years the common Irish oak which I
planted was a welcome arrival in the late spring. So there is still hope. The holly or evergreen oak is certainly
more reluctant to make its appearance. During previous years I had no trouble
in reproducing the Irish or English oak which are abundant in the UCD grounds.
The first
six chestnuts have gone to my son Richard’s farm and four will be going to
cousins in Kilkenny next week. The latter were among the first recipients to
receive three silver birches some years ago and they tell me that they are now a
trio of more than ten feet high. We will be rewarded by having lunch in their
house and by seeing the birches. Our
hosts will be rewarded by thinking of their friends and being aware of our gift
as long as they stay in their home.
Lissenfield with some of it's trees, young and old. |
The
remainder of our young trees will be distributed shortly by friends and family.
Twelve years after my marriage I and my family moved to my parent’s house in
Rathmines. We had two acres there and in response to friends and family wishing
to mark the occasion, we asked for a gift of a tree. When the house was vacated
22 years later we were left with a small but striking arboretum including a
young and sturdy redwood, reaching 30 feet or more but unhappily cut down by later
developers.