Check out an insecticide with the technical ingredient 'cypermethrin' (which is a type of pyrethroid - just google it and you'll find it).
There is a wettable powder type (WP) which leaves a slight residual white powder on the surface. Wasps, dirt dawbers, hornets, etc... WILL NOT LIGHT on it and will not build a nest on it (it'll kill them if it gets on them)
Spray once in the spring just as they are starting to get active and again mid-late summer.
It works wonders, BUT, it is a RESTRICTED USE pesticide so you must have the appropriate certifications to use the stuff. And it is expensive... to the tune of $50-$70 for a pound (but a pound will last you a couple of years.)
If you use a pest service, ask them about spraying your eaves, dish, etc with Demon WP or Cynoff (among other brands) a couple of times each year. I wouldn't think they would charge much for doing that.
The quantities involved in spraying your home, etc, are small and harmless to pets and such.
There is a wettable powder type (WP) which leaves a slight residual white powder on the surface. Wasps, dirt dawbers, hornets, etc... WILL NOT LIGHT on it and will not build a nest on it (it'll kill them if it gets on them)
Spray once in the spring just as they are starting to get active and again mid-late summer.
It works wonders, BUT, it is a RESTRICTED USE pesticide so you must have the appropriate certifications to use the stuff. And it is expensive... to the tune of $50-$70 for a pound (but a pound will last you a couple of years.)
If you use a pest service, ask them about spraying your eaves, dish, etc with Demon WP or Cynoff (among other brands) a couple of times each year. I wouldn't think they would charge much for doing that.
The quantities involved in spraying your home, etc, are small and harmless to pets and such.