They only work if you hang them up prior to a wasps establishing a colony, so for camping etc unless you've a seasonal pitch they'll attract wasps, due to them thinking there's another colony of wasps which is now in there area.
------------- Sunny days and starry skies, the polar opposite of UK camping!
Brown paper carrier bags, stuffed with newspaper, roughly shaped like a large wasp nest and covered in cling film for a bit of waterproofing work as well as the waspinator
But as Solar Cycles says these are only effective at preventing a new Queen establishing a colony early in the year. If a new queen sees a large nest nearby she will not choose to establish her own colony close by.
The main problem with wasps is about this time of year when the colony has finished it's task of producing new queens and the workers are out trying to find sugary food before they starve to death. There certainly seems to be plenty of them around my home at the moment and being a bit of a nuisance coming into the house despite killing off a nest that was developing in a hole in the outside wall earlier this year.
Just have a fig tree bearing fruit away from where you want to sit, attracts all the wasps and hornets for miles. So long as you mask the smell of any food you are eating with citronella smoke the wasps will mostly stay on the figs (or any ripe fruit tree/ sugar trap)
Quote: Originally posted by carol benham on 21/8/2015
I find these to be quite effective as I usually load it with nice sugary stuff - OH hates cleaning it out though
Looks to me a bit like a jar. Why not just use a..er..jar with some jam, honey or just sugared water in it? That's what we always used to do to keep them away from our apple tree (we never sprayed the apple tree). Worked really well as a wasp trap/lure (not many actually died in it btw, in case you were concerned but it did give them something other than our apples to feed on).