[Effects of Meloidogyne incognita initial inoculation density on ginger growth]

The study with potted ginger showed that Meloidogyne incognita infection could reduce the plant height, stem diameter, quantity of shoots, and fresh weight of stem, leaf and root, and finally, reduce ginger yield. With the enhancement of M. incognita initial inoculation density, the growth of ginger was damaged more severely, e. g., under inoculating 50, 100 and 200 M. incognita eggs per 100 g soil, ginger yield decreased by 27.91%, 37.73% and 42.14%, respectively. The reproduction rate of M. incognita was also affected by the initial inoculation density, the lower the initial inoculation density, the higher the reproduction rate. When the inoculation density reached 746.20 eggs per 100 g soil, the reproduction rate was 1.