First report of northern root-knot nematode Meloidogyne hapla on Codonopsis pilosula in China.
In the summer of 2019, a survey for plant parasitic nematodes was conducted in Gansu province, northwest China. During the survey, 35 out of 76 fields of Codonopsis pilosula had plants exhibiting stunting, decline and extensive galling on the secondary and tertiary roots. These are typical symptoms of infection by root-knot nematodes. The causal organism was isolated and identified as Meloidogyne hapla based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of M. hapla in Gansu province and the first report of C. pilosula as a new host of M. hapla.