wasp and nest killer
make a box about 1 ft long and 6 inchs square (educated imerial) put a partition and divide the box in the middle,have the top of the box removable i.e.lid,drill a hole in one end and fit a canadian bee escape (cone type)to allow the waspes in but not out,do the same in the centre partition to allow the wasp into next compartment but not back to the bait then make a hole out of the end for them to escape,fill the first compartment with bait and the second with ant of similar powdwer. the idea being the wasp enters for food then leaves via the ant or wasp powder taking the poison back to the nest so destroying the nest.
Brian