Aphelenchoididae

These pests target a wide variety of hosts, particularly greenhouse ornamentals such as chrysanthemums, begonias, ferns, and strawberries. Due to their ability to survive in dried plant tissues in a dormant state, they are easily transported across borders through nursery stock, posing a continuous risk to agricultural and horticultural operations.

The life cycle of Aphelenchoididae involves egg, larval, and adult stages. They primarily enter plants through stomata or wounds. Their activity is highly dependent on humidity; they thrive in environments with high moisture levels and warm temperatures. Once inside the tissue, they feed on parenchymal cells, causing significant physiological disruption to the plant.

Symptoms of infestation typically appear as angular, necrotic leaf spots that are often confined by leaf veins. As the infection progresses, these spots turn brown or black, leading to leaf wilting, distortion, and necrosis. Heavy infestations cause stunted growth and can lead to the complete loss of commercial value for ornamental crops.

• Strict quarantine and inspection of incoming nursery stock.
• Hot water treatment of bulbs and rhizomes to eliminate internal populations.
• Improving greenhouse ventilation to reduce leaf surface moisture.
• Removing and destroying infected plant debris to prevent soil or surface contamination.
• Application of systemic nematicides in accordance with local regulations.

Management of Aphelenchoididae requires an integrated approach because once the nematodes have infiltrated the leaf tissue, they are well-protected from surface sprays. Agronomic practices focused on hygiene and moisture management are essential to prevent the establishment of these pests in controlled environments and to ensure the health of the crop.