Why DIY wasp sprays make things worse (and what actually works)
That £6 can from the supermarket might kill a few wasps — but it almost always makes your nest bigger, angrier, and harder to remove.
Every summer we get the same call across Hertfordshire: "I sprayed the nest myself and now there are even more of them." Here's why DIY rarely works on a real wasp infestation.
The maths of a wasp colony
A mature wasp nest in August can hold 5,000+ adult wasps, plus thousands more eggs and larvae. The wasps you see flying are only the foragers — maybe 10% of the colony. Killing the foragers doesn't touch:
- •The queen, who keeps laying
- •The brood, which hatches in 48 hours
- •The nurse wasps inside the nest
Within a week, the colony has fully replaced the wasps you killed — and they're now agitated.
Why professional treatment is different
We use a pyrethroid-based insecticidal dust (not spray) applied directly into the nest entrance. The foragers walk through it, carry it deep into the colony, and contaminate every chamber — including the queen.
Result: the entire colony dies within 24–48 hours. Guaranteed.
The hidden risks of DIY
- •Aggressive swarming — supermarket sprays disturb without disabling
- •Stuck wasps in the wall — blocking the entrance traps the colony, which often chews a new exit into your home
- •Insurance issues — many home insurance policies require professional pest control records for stinging-insect-related claims
24/7 callouts, fully insured, on-site within the hour.
Call 07311073937