How To Control Wasps Nests
From May to November, wasps can be troublesome, particularly if you have a wasp nest somewhere near your property.
Wasps can be dangerous if you are allergic to the stings, anaphylactic shock from a sting can result in serious and potentially fatal swelling.
WEAR PROTECTIVE CLOTHING WHEN DEALING WITH WASP NESTS
Here is some information and advice about wasps and how to control and eradicate wasp nests.
There are two main wasp species that cause problems in the UK. The German Wasp, Vespula germanica and the Common Wasp, Vespula vulgaris. German Wasps normally nest in the ground or in bushes, whereas the Common Wasp is more often found within structures created by man, but is also found in the ground and bushes. In recent years, the Median Wasp, Vespula dolicho media has become a problem, usually nesting in bushes, often at about head height and therefore becoming a serious risk to passers by.
Dealing with wasp nests can be somewhat dangerous as they can sting multiple times, not just once, like a bee. Wasps will instinctively attack anyone that ventures too near to their nest, they usually have lookout wasps near the entrance to the nest and these seem to have some kind of communication with wasps that are within the nest. When danger appears, suddenly, so do a number of wasps.
Clearly, getting rid of a nest can provide fairly instant relief from wasp problems, although, expect to continue to see wasps in the nest areas for the rest of the day after treatment as many will be out foraging and may not return for some time. If you remove a wasps nest, the foraging wasps will return and may hang around the nest area for a couple of days, which is why it is best to leave a treated nest in situ so that returning wasps will enter the nest and be killed with the remaining chemical.
Wasps can become confused as to where their nest is located when nest in man made structures, usually new young wasps, on their early trips out of the nest. These young wasps can have difficulty locating the correct route back. Please check that the wasps are actually flying directly into the entry point and not milling around outside, if they are doing the latter, it is likely that the actual nest is in a neighbouring property that looks like your house ie: same colour, same elevation style. Visually check similar houses either side of yours, as treating at your house will not clear a nest that is next door. The "lost wasp" syndrome often fools even the best pest controller. If you live in a semi detached house, check the house next door but one, as this house is probably very similar to yours.
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Destroying a Wasp Nest in a Bush or Shrub
Firstly, make sure you have some protective clothing, particularly a mask if you are using dust/powder insecticide.
Stand about 15 feet from the nest and watch to determine if the wasps have an in and an out flight path, it is usually best to stand in the out flypath rather than the in path.
First choice is always to use an insecticidal powder or dust to destroy a nest. We suggest RENTOKIL WASP KILLER POWDER 300gm (click to see) which contains the non irritant insecticide Permethrin 0.487% w/w. Professionals would use Ficam D which is 1.0% Bendiocarb (this is also available on our site, use "Ficam D" in the top right corner search box).
Try to cover the nest with powder either direct from the pack, or preferably using the Polminor Duster Bellows.
The Digrain Wasp and Hornet Nest Killer Aerosol (professional use) could be used if you were trained as a professional, with this product you could treat the nest from around 6-8 feet away.
Destroying a Wasp Nest in the Ground
Wasps very often nest in the ground and these nests are very easy to deal with.
No equipment is required. Just puff the wasp killer insecticidal dust from Rentokil. Click here: RENTOKIL WASP NEST KILLER DUST
Destroying a Wasp Nest in the Eaves
House eaves are probably the most common place for wasps to nest and cause problems. When wasps are seen coming to and from the eaves of your home this would normally indicate that there is a nest there.
Eaves nests can often be easily treated from within the roof. Often, the wasp nest will be down in the eaves at the edge of open loft area. If possible, do not turn on a loft light. Use a torch to locate the nest but turn the torch away from the nest as soon as you see it, otherwise wasps will come toward the light.
The Rentokil Wasp Killer Powder will probably be all you need providing the nest is not too far down the eaves ie: not more the 500mm down. If it is further than that or if you want to have a better application method, purchase a POLMINOR BELLOWS DUSTER.
If the nest is not accessible from within the roof, then you have a couple of options. Use a ladder and the bellows or Pump Duster and dust directly into the wasp nest entry point using Rentokil Wasp Nest Killer Powder, or Ficam D, alternatively, for safety, use a high reach dust applicator such as the Dustick (18 foot reach) or the DR5 Compression Duster (reach depends on number of 1.5 metre extension lances used).
If you are going to deal with a nest from a ladder, then we stronly recommend the use of full protective clothing ie: Beekeepers Suit, link above.
Destroying a Wasp Nest in a Roof Void
Wasps have a habit of finding access points under roof tiles and roof flashing, particularly around dormer windows, they often nest at the point where the dormer roof meets the main roof. The nest can sometimes be located within the main roof if access is possible.
Openly accessible nests in a roof void present a difficult scenario for the untrained person, unless you have a full protective WASP PROOF SUIT.
This is a high risk wasp nest that although easily accessible, is a whole pack of what will be angry wasps, ready and able to exit the nest quickly and attack. A good quality fly and wasp killer aerosol is useful for added protection and a quick spray of the nest before your main attack will knock down the workers that will almost certainly be on the outside of the nest adding and extending layers.
Wasp killer powder/dust is always our preference in dealing with nearly all wasp nests but using a puffer duster on a hanging nest in a roof void is risky. If possible, use a Gilmour duster or Polminor Bellow Duster and coat as much of the outside of the nest as possible with dust, failing that, use Rentokil Wasp Nest Killer Foam Aerosol and cover as much of the nest as you can in wasp killer foam before promptly vacating the roof.
When treating wasp nests in the eaves of a roof, you can safely break into the nest with the duster lance and get wasp killer powder inside the nest, but DO NOT try that with a hanging nest unless you are fairly sure it won't fall to the loft floor. If the wasp nest falls and you don't have full protective clothing on, vacate the roof and call a professional.
If nest is hanging from the rafters and not more than 4 metres off the loft floor, use a Lodi Power Fogger set off directly under the nest. We would have suggested an Agropharm Midi Fumer in preference to the Power Fogger but you are lighting something in a high fire risk area so, although the smoke generator would probably be better, it is much more dangerous in view of the fact the wasps may drive you out of the roof before you can check that the smoke generator has finished burning. The Power Fogger has no fire risk but if you have a heating boiler in the roof, you need to extinguish any flame prior to using the Power Fogger so then you are back to smoke!
Destroying a Wasp Nest at a High Level
Sometimes, although a nest may be in a roof void, you have no access to get to it, you then need to attack from outside the roof void.
The best piece of equipment for this job is the 18foot reach DUSTICK HIGH REACH DUST APPLICATOR Use Rentokil Wasp Killer Powder or Ficam D (professionals only) in the Dustick. You can use the Dustick for nest anything from 3ft to 18 feet away by adjusting the number of extensions fitted.
The Dustick has a fairly narrow angled nozzle on top of the wasp killer dust chamber, which allows for reasonably precise dust application.
You can also use the less expensive Wasp Go Go Professional for high wasp nest control.
Destroying a Wasp Nest in an Air Brick
Wasps very often make their nests behind air bricks and these are the very easiest for an amateur to destroy.
Although the wasps are entering the air brick, the nest may be up to 6 feet away under a building or it may be directly behind or to the side of the air brick, ie: in a cavity wall.
Use a powder/dust to kill these wasps. You do not need any application equipment but you may have to make several attempts to eradicate a nest behind an air brick. This is because you cannot get enough wasp killer dust to stay in the entrance path for the wasps to pick up and carry into the wasp nest. Usually, 3 daily puffs of Rentokil Wasp Nest Killer Powder will do the trick. Apply over the whole air brick as the wasps will use other holes in the brick if you don't treat all the vent holes. Do it late at night if you are too scared to approach the wasps during the day, however, treatment during the day will be more likely to work rapidly. Even at night, there will be some guard wasps at the entrance to the wasp nest.
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