Citrus rust mite

Definition

A minute eriophyoid mite (Eriophyidae), Phyllocoptruta oleivora, that is a major pest of citrus crops in humid regions worldwide. Adults feed on epidermal cells of twigs, leaves, and fruit, causing russeting, bronzing, or silvering that reduces fruit grade and marketability; damage is primarily cosmetic on fruit but can affect leaf function and tree vigor at high densities. The mite completes its life cycle in 7–10 days under favorable conditions, with overlapping generations allowing rapid population increase.

Etymology

Named for the distinctive rust-colored or bronzed damage it produces on citrus fruit and foliage; 'rust' refers to the appearance of infested surfaces, not to fungal rust diseases.

Example

In Florida citrus groves, citrus rust mite populations typically surge during warm, humid summer months, requiring integrated management with predatory mites (e.g., Euseius species) and selective acaricides to prevent economic injury on fresh-market oranges.

Synonyms

• silver mite
• citrus silver mite

Related Terms

• Eriophyidae
• Phyllocoptruta oleivora
• russeting
• predatory mite
• Integrated Pest Management
• Economic injury level

Usage Notes

The common name is sometimes applied loosely to other eriophyoid mites on citrus, but in technical contexts it refers specifically to Phyllocoptruta oleivora. Damage symptoms vary by citrus type: lemons show pronounced silvering, while oranges and grapefruit develop brown russeting. The mite is often confused with citrus red mite (Panonychus citri), a tetranychid with different biology and control requirements; proper identification is essential for management decisions.