Red coffee mite

The red coffee mite (Tetranychus coffeae) is a significant agricultural pest belonging to the Tetranychidae family within the Acari order. It is recognized globally as a major threat to tropical plantations, often causing severe economic losses by attacking vital industrial crops.

The host range of Tetranychus coffeae is quite extensive, with a primary preference for tea, coffee, and cacao plants. It also infests various leguminous and horticultural plants, which serve as alternative food sources during the off-season, enabling the pest to survive and spread across different landscapes.

The life cycle progresses rapidly through several stages: egg, larva, protonymph, deutonymph, and adult. Given optimal tropical climatic conditions, the mites complete their life cycle in a very short period, often less than two weeks, leading to multiple overlapping generations throughout the growing season.

Damage is characterized by chlorosis and stippling on the leaves, caused by the mites feeding on plant cells. As the infestation grows, the leaves become bronzed and eventually wither. The presence of fine webbing is a diagnostic feature, and heavy infestations cause premature leaf drop and stunted growth of the plant.

Integrated Pest Management (IPM) is essential for effective control. This includes:

• Regular field scouting to detect early infestations.
• The use of biological control agents such as predatory mites (e.g., Phytoseiulus).
• Application of selective acaricides that target the mite population while preserving beneficial insects.
• Maintaining field hygiene by removing alternative host weeds.