We used to burn coconut husk in a metal bucket...works pretty well
im ready to set my property on fire to kill these bastards!
Jesse is correct coconut husks have a smell and slow burn will keep them away . try and not let the husks flame up that just burns quicker and doesn't smoke as much. You want a slow burn that smokes a lot.
I've noticed that closer to town coconuts are scarce . In my neighborhood the coconut men leave piles everywhere.
If you just want chemical weapons of mass destruction Casteo hardware has a propane burning foger that i've used in years past. expensive but gives a fog that works for hours.