Very few insects are able to function properly at temperatures of 45ºF or lower. If these wasps can fly at that temperature, they will not be very fast or agile.

Also, consider that the wasps go into the hive for the night, so if you do anything damaging to them, it's best done at first light.

Try gently sliding a black plastic garbage sack over the hive and then quickly sealing the opening with tape. Again, best done as early in the morning as possible and when the temperature is 45ºF or lower.

If you are successful with the first bag, slip another one over the first. Then take a saw and cut off the branch.

A black plastic garbage bag placed in the direct sun will kill anything inside. No pesticides needed.