10-16 mm – Yellow and black
Insect – High risk
Yellow wasp
The yellowjacket is the most common and aggressive wasp in Quebec. Its yellow and black coloring makes it easily identifiable. It builds papier-mâché nests and can become very aggressive if its nest is threatened. Its stings can cause severe allergic reactions.
§1Distinctive features
How to identify it
10 to 16 mm long, body covered with well-defined yellow and black stripes, glabrous (hairless). Rapid, nervous flight. Well-marked waist.
§2Habitat
Where to find it
It nests in the ground, under terraces, attics, crawl spaces and wall cavities. The gray-brown papier-mâché nests can reach the size of a soccer ball.
§3Reproduction
Lifecycle
Without intervention, an infestation can double in size in just a few weeks.
§4What to look out for
Signs of infestation
- Intense comings and goings of wasps towards an entrance
- Visible grayish papier-mâché nest
- Bites during outdoor activities
- Sweet terrace meals
§5Why act fast
Risks
- Painful stings that can cause anaphylactic reactions
- Extreme aggression if nest is disturbed
- Multiple stings possible (sting not torn off)
- Danger for children and allergy sufferers
§6Prevention
How to avoid it
- Inspect attics and foundations in spring
- Fill cracks and cavities in the house
- Don't leave sugary drinks open on the terrace
- Call a professional if a nest is discovered
§7Pro method
How MW works
Inspection
Home location and assessment.
Preparation
Customized plan – pre-intervention measurements.
Treatment
Locate main and satellite nests, treat with non-repellent baits.
Follow-up
Inspection visit – written guarantee.
§8We answer you
Frequently asked questions
Should the nest be destroyed?
If close to a frequented area, yes. Professional intervention is recommended.
The wasp dies after stinging?
No, unlike the bee, it can sting several times without dying.
When are nests most dangerous?
In August and September, the colony is at its peak and the wasps are at their most aggressive.
React quickly, sleep well.
The longer the infestation lasts, the more expensive it becomes.