Given that ticks are drawn to the C02 their victims emit, I have to wonder whether this would work. Not currently in tick terrain but I'll try it when I am, if I can easily source dry ice in the country. If it works well enough there are relatively inexpensive ways to make your own dry ice...after an initial upfront investment.
Dry ice is pretty expensive, and I suspect this will cost about a dollar per tick destroyed...
Alternatively, one can make CO2 relatively cheaply with yeast and sugar water in a 2 liter pop bottle. If you don't let them pile up the alcohol too far so it kills the yeast, you can use the yeast from the first batch to start a second and perhaps 3rd batch.
Here is a youtube example:
This would also have the desireable effect of produce low amounts of CO2 for longer periods of time.
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