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Some species of flea beetle feed on the leaves of all brassicas and related plants, such as rocket, radish, swede and turnip. The result is a peppering of holes that looks unsightly, particularly on salad leaves. Some ornamental plants, such as wallflowers can also be damaged.
Flea beetle (Phyllotreta sp.) on Turnip (Brassica sp.). Credit: RHS/Entomology.
There are more than 100 species of flea beetle in Britain. A few species feed on brassicas and related plants. The adults feed on the leaves and the larvae on the roots. These small beetles are 2-3mm (about 1/10in) in length, with the enlarged hind-legs that enable them to leap when disturbed.
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