In spring, as temperatures rise, Asian hornet queens (Vespa velutina nigrithorax) emerge from hibernation.
Monitoring now may identify any queens which have overwintered in the UK.
Lynne Ingram, MB and Somerset BKA’s AHAT coordinator, recommends the use of monitoring stations rather than killing traps.
She says: “This allows us to get the evidence of Asian hornets that we need, without killing our native beneficial insects, in particular European hornets.”
At this time of year Asian hornet queens will be searching for sugary foods to build up their energy rather than preying on honey bees. So, all monitoring stations should be positioned where you can easily see them and check them daily - eg outside the kitchen window, or in a sunny spot in your garden. All beneficial insects should be released from monitoring stations daily.
From mid-May Asian hornet queens will be mainly in their nests and so monitoring stations can be removed.
We suggest the adaptation of Thorne’s traps to include wick stations inside to allow wasps and small flies to escape.
Liquid bait - get Suterra (now sold as Trappit wasp attractant) from your AHAT Team leader or buy online. If you can't get it due to current restrictions try one of these French recipes:
If you think you have seen an Asian Hornet:
Jersey is using a modification to the origin design to allow beneficial insects to escape. The wick pot prevents all but the smallest insects from entering from the side. They still require daily monitoring.
Cut the sample pot to half its height ie 3.5cm and fit the lower section through the top section base first. Place a small block of wood or similar over the top of the pot and tap the two parts together. That way you retain the screw top and the modified pot fits snuggly into the trap.
Drill a 12mm hole in the lid to take the wick which is made from paper towelling/Jeyes cloth etc. Fill with your liquid bait.
The wick pot prevents all but the smallest insects from getting down the side, and the liquid bait doesn’t evaporate so quickly. The holes in the trap allow beneficial insects to escape. Please monitor regularly.
For more information check out our Asian hornet page.
And here for resources.