I did a quick 5 min. search and found a few references to spraying for mosquitoes around the Danube in Poland but didn't see a direct reference...
"they tried that on the banks of the Danube and all of the life in the wood disappeared,the mosquito's being near the bottom of the food chains of many animals
just think what all eats mosquito's and their larvae birds ,toads ,frogs ,lizards ,fish ,other insects like dragon flies,then think what all eats those things ,foxes,other birds,weasels,snakes,etc. and then what eats all who eats them ."
All species on this planet evolved for some reason (except man as far as I can tell!) and it is all a delicate balance, 'skeeters have their place. I'm sure a lot of people feel the same way about snakes.. "what good do they do", "we can just poison the rats", etc.
