Alum stone, an anti mosquito for standing water

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Christophe
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Alum stone, an anti mosquito for standing water




by Christophe » 19/08/13, 09:51

Concerning the stone of alum: https://www.econologie.com/shop/pierre-a ... -p-99.html

Here is the excerpt of an email that I just received:

I am currently in Vietnam, and visiting villages that recovers rainwater (because no running water) I asked them how were they doing for fight against the mosquitoes which must have proliferated in their jars (because despite the fact that I saw very many full jars, I did not see any larvae), and they answered me that they put "stone of 'alum"...


Has anyone ever heard of this use?
Someone tested? (I have alum stones but I lack stagnant water with mosquito larvae ...)
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