I've never heard of anything that keeps the yellow flies at bay. when they are out, you really must cover up or stay inside, especially late afternoon (just before dusk) when they are desperately seeking your blood.
the yellow flies are the absolute worst - their painful bite stays with you for weeks, even if not allergic (lots of folks are allergic). however, for some reason it seems that the longer I've lived here, the less they bite me - when they are biting visitors left and right - wonder what that's about.
the yellow flies are the absolute worst - their painful bite stays with you for weeks, even if not allergic (lots of folks are allergic). however, for some reason it seems that the longer I've lived here, the less they bite me - when they are biting visitors left and right - wonder what that's about.
;-)

You just stand out there with your fly swatter when the Dog Flies come for you. Most people make the mistake of comparing the bite of the Deer Fly to the Dog Fly. In that case, the Deer Fly bite is much worse. However, those people forget how painful it is when you slap your leg or face when a Dog Fly bites you. I have sprayed Deet directly onto a biting Dog Fly and the fly continued to bite until I slapped him dead.