The present study consists of three sections. First, the effects of eight fatty acids (butyric, caproic, caprylic, capric, lauric, myristic, palmitic and oleic acids) on the reproduction of Meloidogyne incognita (root-knot nematode) and cucumber growth were estimated. Second, potential antagonism towards to M. incognita of butyric, caproic, caprylic, capric, lauric, myristic, palmitic oleic and linoleic acids was evaluated via egg hatch, second stage-juveniles (J2) mortality and J2chemotaxis. Finally, the e...