In greenhouse tests, a single foliar application of oxamyl (methyl N, N' - dimethyl - Ν - [(methylcarbamoyl) oxy] - 1 - thiooxamimidate) was applied 24 hr before transplanting soybean (Glycine max (L.) Merr.) seedlings in soil infested with Meloidogyne incognita and Rotylenchulus reniformis. Oxamyl at 600 ppm significantly inhibited penetration of roots by M. incognita. No significant penetration of roots by R. reniformis was found.