I'll be the odd guy.
Wet vac with a 10 foot pvc pipe extension.
"MacGyver" it on your hose. Maybe draw a cute hornet on the end. It may take a couple treatments, but you can get 99% of the little devils. Generally mutilates them to the point of walking dead. A shot of wasp killer in the hose won't hurt either.
Bear in mind normal hornets and bald faced (spawn of Satan) hornets bear a strong grudge.
Wet vac with a 10 foot pvc pipe extension.
"MacGyver" it on your hose. Maybe draw a cute hornet on the end. It may take a couple treatments, but you can get 99% of the little devils. Generally mutilates them to the point of walking dead. A shot of wasp killer in the hose won't hurt either.
Bear in mind normal hornets and bald faced (spawn of Satan) hornets bear a strong grudge.