Keeping mice out of your tractors engine bay over the winter and summer too.

[Looking4new]

I use moth balls in the tractor cab, under the hood and under the hood of the car as well.
But I like the smell of math balls. I have some refrigerator containers with lids, drill 9 or so 1/4" holes in the lid, dump in a package of moth balls and close it up and install where ever.