The present invention relates to the use of N-(Phenylcycloalkyl)carboxamides and N-(Phenylcycloalkyl)thiocarboxamides for the control of nematodes in agriculture and as anthelmintic agents against endoparasites in animals and humans, compositions containing such compounds and methods for the control of nematodes and helminths and furthermore to novel N-(Phenylcycloalkyl)carboxamides and N-(Phenylcycloalkyl)thiocarboxamides, processes and intermediate compounds for their preparation, their use as nematicides, compositions containing such compounds and methods for the control of nematodes.本發明係有關一種以N-(苯基環烷基)羧醯胺及N-(苯基環烷基)硫代羧醯胺於防治農業中之線蟲及作為對抗動物與人類之體內寄生蟲之殺蠕蟲劑上之用途、包含該等化合物之組成物,及防治線蟲與蠕蟲方法,且進一步係有關一種新穎之N-(苯基環烷基)羧醯胺及N-(苯基環烷基)硫代羧醯胺、其製法與其製法之中間化合物、其作為殺線蟲劑之用途、包含此等化合物之組成物、及防治線蟲之方法。