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Old 26.04.2020, 21:21
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Yellow dust coming in through windows

Hi all -

I recently moved to the Schwyz canton area and with the weather getting better, I have started opening my windows more. I am noticing that all my furniture and the floor gets layered with yellow dust in just a couple of hours.

When I sweep or mop the floors, there's quite a bit of yellow dust that I see.

Is this pollen dust or something else?

I have put up mosquito nets on all my windows already and that as expected only keeps the big mosquitos out not dust

Mostly just looking to identify what causes this dust. But if someone has suggestions for reducing it, that's a bonus!

TIA
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Old 26.04.2020, 21:25
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Re: Yellow dust coming in through windows

Yes, pollen, it is everywhere. Won't last and the rain will now solve this issue.
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Old 27.04.2020, 03:21
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Re: Yellow dust coming in through windows

Lots and lots and lots of pollen! And the rain isn't helping here yet - when it dries, we're left with a variety of yellow shapes, on the cars, on the house walls, on the terrace, on the leaves of our trees.

Welcome to spring in Switzerland. Ah-choo!
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Old 27.04.2020, 08:59
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Re: Yellow dust coming in through windows

It seems particularly bad this year because it hasn't rained.

There are certain types of window screening which supposedly are better suited to allergy sufferers.

I think our screens catch a lot of the dust, but we are also not opening the windows too much especially when it is windy. The shutters and windows are covered in the stuff.


Hanging laundry outside to dry is also less than ideal at the moment.
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Old 27.04.2020, 09:19
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Re: Yellow dust coming in through windows

Thanks Mrs. Doolittle, smileygreebins, Odile for responding. Looking forward to more rain in that case
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Old 27.04.2020, 10:14
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Re: Yellow dust coming in through windows

You look out and see these lovely fields of yellow. Thatís Canola. A hybrid rapeseed plant. (Not GM - a hybrid)

They have become so ubiquitous as farmers like to rotate their crops with this.

Not normally as bad as this year but the lack of rain is the culprit. If you suffer from hay fever, as I do, symptoms are particularly bad. Particularly as this crop (either ragweed or Canola) isnít indigenous our bodies do not recognise this.
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Old 27.04.2020, 10:21
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Re: Yellow dust coming in through windows

The yellow "dust" is Birchtree happy time pollen, I had a grey car, now itīs yellow.
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Old 27.04.2020, 10:59
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Re: Yellow dust coming in through windows

I would say the yellow dust is fir spruce pollen. There a not so many birch trees to produce that much pollen that it is everywhere.



Last edited by aSwissInTheUS; 27.04.2020 at 12:16.
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Old 27.04.2020, 11:33
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Re: Yellow dust coming in through windows

Just wait til the Sahara sand comes. (not joking)
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Old 27.04.2020, 12:10
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Re: Yellow dust coming in through windows

The pollen was driving Mr Dog crazy. He would come in from his walk and lick and chew his paws which then got red and sore in between the pads. Now we go for a long walk very early morning and late at night and I wash his paws in a bowl when we get back and then sponge him down and it has made a huge difference.

While at first he really objected he now doesn't seem to mind me picking up each paw and putting it in a bowl of lukewarm water. Not so keen on having his face and nose washed though!
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Old 27.04.2020, 12:14
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Re: Yellow dust coming in through windows

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There a not so many birch trees to produce that much pollen that it is everywhere.
Its not about how many, it is about how much pollen each tree releases.

Ash-tree and birch release about 10x times pollen than anything else. You can look up the numbers here.

Up to date peak concentrations:
Hasel 310
Alder 160
Ash-tree 800
Birch 1500+
Oak 300

All grass is normally at the level of 200, for comparison.

So, whereas Birch is not the most common tree here, its pollen certainly is.
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Old 27.04.2020, 12:32
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Re: Yellow dust coming in through windows

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Its not about how many, it is about how much pollen each tree releases.

Ash-tree and birch release about 10x times pollen than anything else. You can look up the numbers here.
And where is spruce and fir in your list? You know why it is not on the list?
PS: I made a mistake above. "Fichte" is Spruce.
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Old 27.04.2020, 12:36
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Re: Yellow dust coming in through windows

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Is this pollen dust or something else?
yes, it's pollen. If you look at the lake, it has been cover for the last few days.
It's funny to see it moving from one side of the lake to the other.
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Old 27.04.2020, 12:56
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Re: Yellow dust coming in through windows

This year is the worst i've seen .. Our car, garden furniture, BBQ, pool cover etc.. Bright yellow.. Yesterday we got 10 mins of rain and now we have yellow wavy lines where the rain washed it .. And yeah inside the house too..

Strangely though I'm not suffering at all, not a single sniff or sneeze .. Maybe the septoplasty operation i had last year has helped to not block the stuff in my nostrils.
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Old 27.04.2020, 15:55
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Re: Yellow dust coming in through windows

:d

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the pollen was driving mr dog crazy. He would come in from his walk and lick and chew his paws which then got red and sore in between the pads. Now we go for a long walk very early morning and late at night and i wash his paws in a bowl when we get back and then sponge him down and it has made a huge difference.

While at first he really objected he now doesn't seem to mind me picking up each paw and putting it in a bowl of lukewarm water. Not so keen on having his face and nose washed though!
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Old 27.04.2020, 17:41
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Re: Yellow dust coming in through windows

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Just wait til the Sahara sand comes. (not joking)
it's already happening.
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Old 27.04.2020, 18:09
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Re: Yellow dust coming in through windows

I was told the fir trees only bloom every three years, and that is why it is so bad this year.
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Old 27.04.2020, 19:29
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Re: Yellow dust coming in through windows

Birch comes earlier. It's mainly Tannen/Fichte I believe which luckily not so many people are allergic to. I guess that is why it is not on the list.
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Old 27.04.2020, 20:56
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Re: Yellow dust coming in through windows

its a plague. Time for another lockdown!
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Old 28.04.2020, 16:58
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Re: Yellow dust coming in through windows

Find the pollen calendar here. It gets adjusted for seasonal weather. Notice the more detailed information for different areas.
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