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le radici infatti essudano una sostanza che attira varie specie di nematodi che, una volta penetrati, vengono uccisi dalle tossine (tiofeni) a base di zolfo ad azione nematocida in esse contenute.
in fact, the roots exude a substance attracting various species of nematodes that, once penetrated, are killed by the sulphur based toxins (tiophenes) with nematocidal action contained by them.