Rust-Colored Spots on Hamlin Oranges: Citrus Rust Mites

A gardener in Lakeland, Florida, planted 8-year-old Hamlin orange trees in spring and noticed a rust color on fruit on the north side of one tree, wondering if it was a disease.

Identification: Citrus Rust Mites

The rust color is typical of citrus rust mites, tiny pests that feed on fruit surfaces, causing discoloration often called "russeting." While the fruit remains edible, appearance suffers.

Treatment Recommendation

Apply a miticide to control the infestation. A good option is Pure Neem Oil Spray, which acts as a miticide and also deters other harmful insects. It's natural, long-lasting (doesn't wash off easily), and alters plant flavor so pests move elsewhere. Follow label directions for application rates and timing.