Orchid thrips

Systematic position: The genus Chaetanaphothrips belongs to the order Thysanoptera and the family Thripidae. These insects are notorious pests in greenhouse environments, causing significant physiological stress to host plants through their feeding activities.

Host plants: The pest exhibits a wide host range, primarily affecting orchids, anthuriums, and other tropical foliage plants. In commercial agriculture, it is known to damage citrus fruits and bananas, creating necrotic lesions that render the produce unsellable.

Biology and life cycle: The life cycle involves egg, larva, two pupal stages (propupa and pupa), and adult. Unlike many other thrips, Chaetanaphothrips species often pupate in protected sites such as leaf axils or soil debris. Their development is rapid, particularly under warm, humid conditions, allowing for multiple generations per year.

Damage and severity: Feeding occurs by rasping the plant epidermis and sucking the released cell contents. This leads to stippling, silvering, and distortion of leaves. On fruit crops, the feeding activity results in distinct scar tissue or discoloration, which significantly impacts the marketability of the harvested produce.

Control measures: Integrated Pest Management (IPM) is essential for effective suppression. Strategies include:

• Regular monitoring using blue or yellow sticky traps to detect population spikes.
• Application of systemic insecticides such as spinosad or neonicotinoids where permitted.
• Biological control using predatory mites like Amblyseius cucumeris.
• Sanitation protocols, including the removal of infested plant debris and disinfecting surfaces.