In a casual discussion about our forthcoming Brunei trip, my friend from another platoon tells me that Garang Brunei King told them a method to ward off mosquitoes: keep a portable, self-fuelled Bunsen Burner under yuour personal hammock and keep it running, then the smoke will prevent the mosquitoes from coming.
The mosquitoes won't even come because you've become charred flesh and your blood all gone.