Wasp nest killer powders

TheGreenFrog

I have had to destroy two nests in the last month.  The first was in my garden shed and was destroyed by double application of a smoke bomb.  The second was inside the cavity wall of my garage, wasps entering below the door lintel which meant being surrounded by them whenever I wanted to enter the garage. That was destroyed by multiple applications of insecticide powder by the entrance.  I have a third nest in some brickwork but, as it is not really bothering anyone and is unlikely to grow too large, I have left it alone.

My local Screwfix and Toolstation seem out of wasp killers - but I have bought ant powder and other insecticides as for any given brand and method of application the active ingredient seems to be the same (so a brand's wasp killiing powder is the same as its ant killing powder).

troggers

I have a similar failure with Zero In powder.  The nest is inaccessible under the house eaves; it is probably either in the wall cavity or in the roof insulation, but it is clear where the wasps enter and exit.  I have liberally spayed the area with Zero In power using a puffer and lance on multiple occasions.  The wasps walk right over the power on with way in and out, and seem completely unaffected.

Time to try another brand, methinks; this stuff seems useless.

Section62

troggers said:

I have a similar failure with Zero In powder.  The nest is inaccessible under the house eaves; it is probably either in the wall cavity or in the roof insulation, but it is clear where the wasps enter and exit.  I have liberally spayed the area with Zero In power using a puffer and lance on multiple occasions.  The wasps walk right over the power on with way in and out, and seem completely unaffected.

Time to try another brand, methinks; this stuff seems useless.

AIUI Permethrin is a fast-acting insecticide, but isn't a 'knock-down' one at the concentrations sold to consumers.  So the wasps wouldn't drop dead on contact with the powder.  This has an advantage, in that wasps entering the nest will carry the insecticide into the nest with them, killing more than just themselves.

Powders intended for direct injection into the nest won't work as well in more open environments.