Flea beetles mainly damage the kohlrabi that is sown and planted in the warm season.
These pests occur mainly in dry, hot weather. Especially in the seedbed, they can jeopardize the whole success. There the flea beetles completely destroy the cotyledons, so that the plant cannot continue to grow. Kohlrabi that have just been planted can also suffer considerable damage. The chemical industry has developed flea agents, which are either dusted or sprayed. They are applicable, before noticeable damage is caused by pitting.