I have been following this story for a while
Initially when the bees started dying the cause was unknown although a poison was suspected.
Samples were sent to MPI and it turns out Fipronil (the active ingredient in vespex and also frontline for flees) was the cause.
I think this highlights the need for understanding the wasps protein cycle\link and not using a sweet\sugar lure.
For those of you that are interested check this out...
https://www.radionz.co.nz/news/natio...-police-matter
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