Sunday, February 20, 2011

Early Wasp Boom - How to Get rid of Wasps

In late summer and autumn wasp numbers are at their highest. It is normal for people to be bothered by more wasps and find more wasp nests in the months of March and April (in New Zealand). As mentioned in my recent blog on the affect of the La NiƱa weather pattern on insect  numbers the wasp boom has come early this year. As you can see from this chart, the numbers of enquiries tot he Kiwicare website are still rising and are far above the peak of last year already.

Visits to re wasps 2010/11 (blue) vs 2009/10 (green)
The German Wasp and Common Wasp are the main pest wasps in New Zealand, but the Asian Paper Wasp can also rise to considerable numbers in the North Island.

How to get rid of Wasps or Bees

Nests - The nests of German and Common wasps generally have only one entrance/exit. If this can be identified the colony can be destroyed by sprinkling or puffing the apicide NO Wasps Dust or NO Insects Carbaryl 80 into the entrance. The workers will then pick up the dust as they enter the nest and take it inside where it will kill larvae and queens.

Great care should be taken in treating the entrance to a nest as there is a risk of being stung. It may be advisable to do this operation at night when there is no wasp activity.

In some cases a nest may be in a difficult to reach situation where powder cannot be applied to the nest entrance. NO Bugs Bug Bombs or NO Bugs Borafume fumigators can often be used in sheds and roof voids to destroy wasp colonies safely and without need to access the nest entrance.

If the nest site cannot be found it is possible to reduce wasp numbers (and maybe kill a whole colony) using NO Wasp Bait Concentrate mixed with a suitable bait such as sugar* or canned fish.

NO Wasps Trigger sprays are useful to treat around rubbish bins and other areas where wasps are attracted.

*Caution: Where there is a risk of attracting bees to the bait, sugar and syrup baits should not be used. In such risk areas use canned fish, raw meat, carrion or fish skeletons as an attractant and spray with water based mix described above. Fix the bait inside an inverted can and suspend from a suitable tree. Respray every 2-3 days.

Honey bee swarms - if you find a large 'clump' of bees, hanging from a branch or the side of your house, this is likely to be a bee swarm. This is a queen with her new colony looking for a place to build a nest. Contact you local beekeeper (see the National Beekeepers Association swarm collection contact list) and he/she will try and collect the swarm without harming it for use in honey production. The swarm may move on of its own accord within a day or two.

Note: Honey bees are generally not aggressive while swarming.

A man walks down a street, and enters a shop. He spends a few minutes browsing round the shop, and then apporaches the check-out desk.
"Hello", he says, "I would like a dead wasp, please".
The shopkeeper replies "I beg your pardon sir? This is a Pharmacy - we only sell medicines and bathroom products".
The man says "Yes, I know this is a Pharmacy. However, I would like to buy a dead wasp".
The shopkeeper is a little confused "Sir, this is a Pharmacy. We DO NOT sell dead wasps."
The man replies: "So why have you got one in the window then?!"


  1. Hi! I have read about how to kill a wasp nest.It is quite the same as your tips. Thanks for posting. It is abig help.

  2. 18, 2015 at 8:09 PM

    Do wasps kill wild bee nests, if so what do I have to do to get rid of them?

    1. Hello,
      Thank you for your question.
      Wasps are a bee colony's biggest enemy. Wasps will attack a honey bee colony and steal the honey.
      The best way to get rid of the wasps is to find their nest and treat it with powder insecticide such as Kiwicare's new NO Wasps Eliminator.
      If the nest/s can't be found then baits can be used but they should be protein baits so that they will not be fed on by the bees. See here for more info.
      Kind Regards



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