Brevipalpus phoenicis

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Brevipalus phoenicis, also known as the false spider mite, the red and black flat mite, and in Australia the passionvine mite, is a tiny mite in the family Tenuipalpidae. It lives worldwide, especially in the tropics, and is a major pest of many crops, including citrus, tea, papaya, guava and coffee.

Description
Adult Brevipalpus phoenicis are flat, oval mites about 0.28 mm long and 0.15 mm wide. They range in color from dark green to red-orange. Males are wedge-shaped, while females are flatter. The mite has two pairs of legs that point forward and two that point backward. A distinctive feature is two sensory rods on one foot that helps distinguish it from similar mites. Under some temperatures, females can show a black, H-shaped mark.

Life cycle and reproduction
Most individuals are female. The species is largely parthenogenetic, meaning eggs that aren’t fertilized develop into females. A female lays about 50–60 eggs, which hatch in roughly 8–16 days. Eggs are reddish-orange and often laid in clusters in leaf cracks or tiny leaf cavities. Development from egg to adult takes about 12–24 days. There is a brief resting phase before each molt, during which the mite attaches to the plant by its mouthparts and does not feed. Adults live up to about 5–6 weeks. Temperature and humidity strongly affect life span and reproduction.

Habitats and hosts
Brevipalpus phoenicis has a very wide host range, feeding on at least 65 plants and possibly up to around 1,000. In Florida it is known to infest crops such as grapefruit, lemon, orange, papaya, hibiscus and other ornamentals, as well as some garden plants.

Damage and impact
Mites feed by injecting saliva and puncturing plant cells, which damages the cells and creates visible stippling. This can spread into brown patches, stunt growth and deform young shoots. In citrus, heavy feeding can severely reduce fruit production and quality, and in some cases can kill parts of the plant. Papaya and other crops may show browning, dead tissue, and poor yield. The mite can also spread plant diseases, acting as a vector for Citrus leprosis and the coffee ringspot virus.

Control and management
Early in the 20th century, sulfur was used to control this pest, but it harmed beneficial insects. While there are natural predators, they are not usually enough to keep populations in check. Today, pesticides are commonly used to manage outbreaks, as there are few easy alternatives. Effective management often requires an integrated approach, including monitoring, cultural practices to reduce mite-friendly conditions, and timely chemical control.