Web mite Eotetranychus deflexus

Eotetranychus deflexus is a species of spider mite belonging to the family Tetranychidae. As a specialized phytophagous pest, it targets various tree and shrub species, feeding on the intracellular content of leaves. Its presence can significantly compromise plant health, particularly during periods of warm and dry weather.

The host range includes a variety of deciduous plants. The mite primarily colonizes the undersides of leaves, establishing colonies that gradually spread across the foliage. By piercing the epidermal cells, these mites disrupt photosynthesis and physiological balance, leading to stunting and physiological stress in the host plants.

The life cycle of the pest is highly dependent on ambient temperature. It progresses through egg, larval, and nymphal stages to reach maturity. In optimal environmental conditions, the mite can complete several generations within a single growing season, making it a persistent threat that requires constant monitoring and proactive management.

Initial signs of infestation involve chlorotic spots on the leaf surface, which subsequently coalesce. As the colony grows, the webbing becomes visible, covering large parts of the leaf area. Severe damage manifests as leaf chlorosis, necrosis, and premature abscission, which negatively affects the overall vitality and aesthetic value of the affected plants.

Integrated pest management (IPM) measures are crucial for control:

• Application of selective acaricides to prevent rapid population growth.
• Biological control through the introduction of predatory phytoseiid mites.
• Maintaining optimal irrigation to mitigate the effects of moisture stress, which favors mite outbreaks.
• Regular inspections of nursery stock to prevent the introduction and spread of the pest.