Wasps

Biology:

Of the various wasp species, only the striking yellow-black colored, 13 to 20 mm long German wasp and the very similar common wasp are a nuisance. Both species can hardly be distinguished by the layman. They live in annual colonies, i.e. the workers die in the fall. Only the fertilized young queens survive the winter and found a new nest the following year. The wasp nests are usually in the ground, but are also artfully constructed from a paper-like mass in shutter boxes, attics or similar places. As sugar is also on their menu, they may come into contact with humans when searching for it. Wasps normally only use their sting against humans in times of need, distress and for defense.

Damage:

If they occur frequently, wasps can become very annoying by feeding on fruit, juices, cakes, meat and other items. If they occur in food-processing businesses or restaurants, they should be regarded as hygiene pests, as their activity can spread pathogens and mold spores. Their stings are very painful and can pose a great danger to people with insect bite allergies.

Tip:

In order to prevent wasp nuisance, the first thing to do is to remove or keep under lock and key any substances that attract wasps (fruit, fruit waste, jam, etc.). If a wasp nest is found in the vicinity of apartments or houses, it is advisable to hire a professional pest controller to deal with it, as wasps can react very aggressively if they feel disturbed or harassed. However, as wasps are primarily insect exterminators and should therefore be regarded as beneficial, they should not be controlled if possible. If the colonies cannot be tolerated in their location (e.g. living on a window that is opened daily), they should be relocated by a specialist.