If you want to protect yourself from mosquitoes and ticks—which seem to be everywhere this year—you might need to enlist a heavy-hitter. Insect experts reach for one thing: permethrin. Here’s what to ...

If you’re grossed out by the idea that you might be bitten by a tick this year (chances are good, to be honest), now is the time to get yourself a bottle of permethrin spray. Permethrin-treating your ...