T. R. Gourd Gourd, T. R., Schmitt, D. P., & Barker, K. R. (1994). Differential sensitivity of Meloidogyne spp. and Heterodera glycines to selected nematicides. Journal of Nematology, 25(4), 746. Gourd, T. R., Schmitt, D. P., & Barker, K. R. (1993). Penetration rates by second-stage juveniles of Meloidogyne spp. and Heterodera glycines into soyabeans roots. Journal of Nematology, 25(1), 38. Gourd, T. R., Schmitt, D. P., & Barker, K. R. (1993). Use of nematodes as biomonitors of nonfumigant nematicide movement through field soil. Journal of Nematology, 25(1), 63. Gourd, T. R. (1990). Differential activity of selected nematicides on Heterodera glycines races and Meloidogyne species. Dissertation Abstracts International. B, Sciences and Engineering, 51(4).