It is the ability of wasps to cause painful stings that concerns most people and unlike bees, wasps can sting several times. Adult worker wasps have the characteristic black and yellow patterning on the abdomen and are between 15 - 20 mm long. They have a black head and thorax. The fore and hind wings are held together by a row of minute hooks giving the appearance of only one wing per side of the wasp.
The most effective treatment for wasps is an insecticidal dust to the nest, around and into the entrance.
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