The water hose thing wouldn't work down south..,
our yellow jackets are more emotional ;)
It worked very well at a friends place outside Pensacola, FL a couple years ago :-\
Our Northern insects are mostly dormant for up to 7 months a year, it makes most of them extremely aggressive (hungry?).
I've spent/worked considerable time in the southern States, living in Georgia, Louisiana and Kentucky for a time and still visit family and friends in Florida almost yearly.
In my own experience, and likely because of your looooong summer season, I've found southern mosquitoes, wasps, hornets and flies, (insects in general w/ exception of those Africanized bees) to be kinda lazy compared with Northerners.
Have you ever been to Rural Canada during the early Spring/summer? They don't make fly swatters big enough :-D