SEROLOGICALLY BASED DIAGNOSTIC AND QUANTIFICATION TESTS FOR NEMATODES

Plant parasitic nematodes are important plant pests which are difficul t to identify and quantify. Serologically based techniques offer new w ays to identify and quantify these parasites. Several factors need to be considered when developing an immunoassay for plant parasitic nemat odes, including the application of the assay and the extraction proced ure which together determine the likely organisms with which antibodie s may cross-react. The four major factors: taxon specificity, nematode stage specificity, antibody specificity, and the level of management which is possible, need to be addressed interdependently and the best possible compromise made to develop a practical assay. Progress has be en made in the immune-diagnosis and quantification of potato cyst nema todes (Globodera spp) and root-knot nematodes (Meloidogyne spp) and th ese two groups of nematodes present different problems and therefore d ifferent challenges. The research reported here compares and contrasts work on these two groups of nematodes and highlights some of the impo rtant factors to be considered in the development of immunoassays for plant parasitic nematodes.