The B1 helps with ticks, too. 

To repel mosqitos, rub your clothes with crushed ragweed.  Remember, respiratory allergies for those who are susceptible is due to the pollen, not the plant itself.  So if susceptible, don't use the flowers when doing this.  It does work, scientifically tested, though I don't have the publication handy for citation.  mcneely

---- JRodgers <jrodgers113@GMAIL.COM> wrote: 
> If you are doing this this summer - here is a tip to help make you less
> attractive to mosquitoes - which are a bane here in the Southeast and in
> the Alaska.
> 
> You may  want to forgo bananas during mosquito season. According to Dr.
> Janet Starr Hull, “there’s something about how your body processes the
> banana oil that attracts these female sugar-loving insects.”
> 
> Additionally,
> 
> She also recommends supplementing with one vitamin B1 tablet a day from
> April through October, and then adding 100 mg of B1 to a B100 Complex
> daily during the mosquito season to make you less attractive to
> mosquitoes. Research also suggests that regularly consuming garlic or
> garlic capsules may help protect against both mosquito and tick bites.
> 
> My own doctor told me about the B1 and B100 complex.
> 
> Burning some powdered  pyrethrums like marigold petals just before bed
> time helps too.
> 
> John

--
David McNeely