Wasps prefer to be warm and dry. The sunnier the year, the more lush the wasp colonies usually develop. Against this background, water as a means of expulsion is quite obvious. Conveniently, it is also very easy to use.

Water as a wasp deterrent
Wasps only like water to drink. Then all the more, because the hard work in midsummer not only makes the insects very hungry, but also incredibly thirsty. Perhaps you have already seen almost dried up wasps slurping greedily at small pools of water on the terrace or at the edge of the swimming pool.
Water from above, especially in large quantities, is rather dangerous for them. In rainy weather you are unlikely to see a wasp flying around. The large, heavy raindrops from summer thunderstorms in particular can cause flying insects to stumble.
In years with a lot of rain in summer, whole wasp nests can even be washed away by violent storms and most of the animals drown.
So, apart from its thirst-quenching function, water primarily endangers wasps in the form of:
- large, splashing raindrops - danger for individual animals in flight
- larger water masses during storms - nests can be washed away
How to use water specifically for expulsion
A simple and very practical way to drive away wasps with water is the good old water disperser. Such a sprayer can be found in almost every household. By spraying annoying wasps, you can fool them into thinking it will rain - but for the hard-boiled and clever animals to really run away and stay away, you have to spray properly.
Make sure you use a clean disperser with no residue of cleaning products that can seriously harm the wasps. Flooding soil nests with sugar water, which sticks together and kills the wasps, is even less animal-friendly and, in the case of some species, even a punishable offence.