Tucuman flat mite

The Tucuman flat mite (lat. Brevipalpus tucuman) belongs to the Tenuipalpidae family within the order Trombidiformes. These microscopic arachnids are recognized as significant pests in various agricultural regions, particularly impacting citrus production in South America.

The primary host range for this pest includes citrus species, such as lemons and oranges. Because of its ability to thrive on various plant tissues, the mite can maintain populations on alternative host plants, making it a persistent challenge for integrated pest management programs.

The biology of the mite involves a complex life cycle consisting of the egg, larva, protonymph, deutonymph, and adult stages. The mites are typically found on the undersides of leaves, on fruit, and on green shoots. Their reproduction rate is highly dependent on environmental conditions, allowing them to complete multiple generations within a single season.

Damage caused by Brevipalpus tucuman is characterized by cell sap extraction, which leads to localized necrosis and tissue death. Infested plants may show leaf yellowing, stunting, and premature abscission of leaves and fruit. Beyond direct feeding damage, these mites weaken the overall vigor of the trees, leaving them vulnerable to other environmental stresses.

Effective control strategies require a combination of chemical and cultural practices to maintain mite populations below the economic injury level:

• Regular field scouting to detect early infestations;
• Application of selective acaricides during peak growth periods;
• Maintaining healthy tree vigor through proper irrigation and fertilization;
• Removing and destroying infested plant material to reduce local population pressure.