The present application relates to the use of Daucus carota plants which do not belong to the Daucus carota subsp. sativus subspecies of cultured carrots to disinfect a culture medium infested with Heterodera carotae nematodes, using the nematicidal power of the plants. The present application also relates to Daucus carota plants which are resistant to the Heterodera carotae nematode, and to methods for culturing such plants which make it possible to reduce the population of Heterodera carotae nematodes present in a culture medium.
