UKTC Archive

Re: Poplar seed

Subject: Re: Poplar seed
From: Wayne Tyson
Date: Sep 04 2017 16:27:09
Great responses, especially the latter. Log most of the females, leave the
males for their beauty? Ban females in the towns and cities?

W

On Mon, Sep 4, 2017 at 5:04 AM, Howe, Ron <Ron.Howe@xxxxxxxxxxx.gov.uk>
wrote:

I did a fair old bit of research into this stuff some years back as a
result of an appeal and, people get very confused. On the whole, tree seeds
are too large or heavy to cause allergy. It is the pollen that is the main
aggravator. Many tree species also have pollen that is too large and heavy
also. I suspect that the there may be some confusion over the Cottonwood
seed. However it may well be the case that the fine hairs making up the
cotton wrapping the seed might cause nasal irritation but again I suspect
they are too large. It is pretty much the stuff we can't see that leads to
problems ... the stuff you see dancing in a beam of light breaking through
your curtains. In the autumn you see plenty of Conifer dust about but what
is more likely to be the problem then is Aspergillus fungi spores which
abound all over our trees but more often on Conifers due to the conditions.
I note one of the articles was a little vague as well, quoting all sorts of
other problems such as blocking car radiators. That is usually the type of
annoying nuisance that leads to such misunderstandings. On the whole, for
something to lead to allergy it needs to be small enough for the
immunoglobulin (IgE) cells to react to as a result of enzymes produced by
the allergen and that can occur simply as result of the allergen dissolving
in the fluids linings of your nose or lung. Quite often parasites are
relatively large but they produce chemicals, enzymes.  The fine hairs of
most cottony seeds are silicone which is more likely to cause irritation.
Makes sense once it's all explained ...

Ron Howe
Tree Officer (Planning)
Mole Valley District Council
Tel. 01306 XXX XXX


-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info [mailto:uktc-request@lists.
tree-care.info] On Behalf Of will ross
Sent: 21 August 2017 12:29
To: UK Tree Care
Subject: RE: Poplar seed

Edmund,
                 Try these  , I managed to find a few links
http://www.scidev.net/south-asia/forestry/news/female-
poplars-linked-to-allergies.html

http://www.ehow.com/facts_5475931_symptoms-allergies-cottonwood.html

Regards

Will
-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info [mailto:uktc-request@lists.
tree-care.info] On Behalf Of Edmund Hopkins
Sent: 21 August 2017 11:27
To: UK Tree Care
Subject: Poplar seed

Is anyone aware of a medical condition or conditions associated with the
'cotton wool' produced by (some) Poplars in the early summer? I'm sorry to
use the term 'cotton wool' but the technical term escapes me.

Regards,

Edmund Hopkins
Tree Officer
Heritage and Urban Design
City Planning
0115 XXXXXXX

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