The nematode which causes less damage in soils with high organic contents is

The nematode which causes less damage in soils with high organic contents is the Lesion nematode.
Pratylenchus is a genus of nematodes known commonly as lesion nematodes. They are parasitic on plants and are responsible for root lesion disease on many taxa of host plants in temperate regions around the world. Root lesion nematodes (RLN) are microscopic worm-like animals that extract nutrients from plants and soil.