Nematode suppressive crops reduce the population of plant-parasitic nematodes below damaging levels upon their planting or incorporation into the soil. These crops suppress the nematode population either by acting as a poor host, trap crop, cover crop or antagonistic crops. Nematode suppressive crops are one of the best options for nematode management in various crops in view of sustainable agricultural production systems. This method is economical and easily accepted by farmers as it can be practiced with normal agronomical practices in crop cultivation. In addition to the nematode control, it also improves the nutrient status and other physicochemical properties of soil. Though the use of nematode suppressive crops may not eliminate the plant-parasitic nematodes in the soil, it helps to reduce the nematode population enough to allow production of nematode susceptible crops and well fits in the Integrated nematode management package.
DNA barcoding is an efficient molecular approach for identification of nematode species. Among nuclear and cytoplasmic genes, SSU r RNA genes proved to be potential markers for DNA barcoding. Barcoding is highly useful technique for quarantine purpose by increasing the speed of identification to avoid entry of new pathogen in new area. Nematode barcoding is not only useful for species identification, but also for evolution and phylogenetic studies of nematodes. Integration of advance morphological approaches (video capturing) with molecular approach (DNA barcoding) will provide an efficient platform for identification of nematode species which is the need of hour.