Hemicycliophora parvana

Hemicycliophora parvana belongs to the phylum Nematoda, order Rhabditida, and family Hemicycliophoridae. These microscopic worms are obligate plant parasites that live as ectoparasites in the soil, feeding on the roots of various agricultural and ornamental crops.

This pest affects a wide range of hosts, including cereals, vegetables, berries, and ornamental plants. They are most commonly found in the rhizosphere of plants growing in light, sandy soils, where nematodes can easily move and reach the root system to initiate feeding.

The biology and life cycle of this species are closely linked to soil and climatic conditions. Females of this species are characterized by a cuticular sheath that protects them from adverse environmental factors. The life cycle includes an egg stage and four larval stages, with both larvae and adults acting as invasive forms for the plant.

The nature of the damage manifests as stunted root system development. While feeding, the nematodes pierce the root epidermis cells, causing tissue necrosis and the formation of galls or swellings. The plants become stunted, their resistance to drought decreases, and secondary infections easily penetrate through the damaged root areas.

Control measures require a comprehensive approach, including:

• Crop rotation with non-host plants.
• Application of nematicides or soil fumigants under high pest pressure.
• Maintaining high-level agronomic practices, such as organic fertilization.
• Effective weed management to remove reservoir hosts for nematodes.