Description: wasps are 10 to 20 mm in size, have a narrow waist and a sting and are typically yellow with black stripes. Wasps live together in a nest with an egg-laying queen and non-reproducing workers.
Biology: two pairs of membranous wings are held together by small hooks, and the forewings are larger than the hind ones; in some species, the females have no wings. In females, there is usually a rigid ovipositor, which may be modified for injecting venom, piercing or sawing.
Control: the wasp nest should be located by examining all areas in the vicinity of wasp activity. Just removing the wasp nest will not resolve the problem, because surviving wasps will reconstruct a new one. The best strategy is to treat the wasp nest at night when all the workers and queen are present. Wasp sprays cause insects to drop instantly.