Spiral nematode

Taxonomy: Helicotylenchus lobus belongs to the phylum Nematoda, class Chromadorea, order Rhabditida, and family Hoplolaimidae. It is widely recognized as a migratory endo- and ectoparasite that impacts various agricultural crops globally by targeting root tissues.

Host range: This nematode species affects a broad spectrum of plants, including cereals, legumes, vegetables, and ornamental plants. Because it is highly adaptable to different soil types, it can persist in diverse environments where its hosts are cultivated continuously.

Biology and life cycle: The life cycle of Helicotylenchus lobus consists of an egg stage and four subsequent juvenile stages that develop into adults. The nematode thrives in moist soil conditions, actively searching for suitable host roots using sensory organs to locate root exudates for feeding.

Symptoms and damage: By feeding on root cortical cells, the nematode causes tissue lesions, stunted growth, and reduced root mass. Infected plants often show signs of water stress, nutrient deficiency symptoms, and reduced vigor, which ultimately leads to significant yield losses in affected fields.

Protection and control: Integrated pest management (IPM) is essential for controlling this nematode. Strategies include crop rotation with non-host plants, the use of organic soil amendments, maintaining proper irrigation, and the strategic application of chemical or biological nematicides.

• Proper sanitation of farming equipment
• Use of certified pathogen-free seeds
• Regular soil health testing
• Planting trap or cover crops