Longidorus arthensis

Longidorus arthensis is a significant soil-borne nematode belonging to the Longidoridae family, order Dorylaimida. Known as needle nematodes, these organisms are ectoparasites that feed on the root tips of plants by penetrating tissues with their elongated odontostyle to extract cell contents.

This pest affects a wide range of host plants, including various horticultural crops, soft fruits, and sugar beets. They are particularly troublesome in light-textured, sandy soils which allow for easier migration through the soil profile toward the roots of emerging crops.

The biology of L. arthensis is characterized by a slow life cycle. These nematodes go through several molting stages, with both juveniles and adults acting as active parasites. They rely on the constant presence of host roots to survive and reproduce, although they can persist in the soil for significant periods under favorable conditions.

The damage caused by this nematode is severe, as feeding leads to the formation of galls and the cessation of primary root elongation. The root tips often turn brown and necrotic, which severely restricts the plant's ability to absorb water and essential minerals, leading to stunting and reduced economic yield.

Control measures must be preventative and integrative. Management strategies include:

• Regular soil testing to identify nematode hotspots before planting.
• Using nematode-resistant crop varieties where available.
• Implementing long-term crop rotation schemes.
• Applying soil fumigants or biological control agents in highly infested fields.