5Cenis J L. Identification of four major Meloidogyne spp. by ran- dom amplified polymorphic DNA (RAPD- PCR). Phytopatholo- gy, 1993, 83:76-80.
6Fen'is V R, Ferris M, Faghihi J. Variation in spacer ribosomalDNA in some cyst - forming species of plant - parasitic nema- todes. Fundamental and Applied Nematology, 1993, 16:177 - 184.
7Vrain T C, Warkarchu K D A, Lrvesque A C, et al. Intraspecif- ic rDNA restriction fragment length polymorphism in the Xiphine- ma americanum group. Fundamental and Applied Nematology, 1992, 15:563-573.
8Williams, K, J. Orton. Meloiclogyrve hapla. CIH Descriptions of Plant - panrsitic Nematodes Set, 1974,31 : 3.
