Pests

Azalea spider mite

Rhododendron simsii Planch.

Infestation of Indian azalea by spider mites (Tetranychidae), particularly the two-spotted spider mite, leads to leaf yellowing, bronzing, and premature leaf drop.

In the reference 4 varieties crop Indica azalea, where this is mentioned in the description.

On Rhododendron simsii Planch., the term "spider mite" refers to members of the Tetranychidae family, with the two-spotted spider mite (Tetranychus urticae Koch) and the specific azalea mite (Eotetranychus clitus) being the most common. Damage manifests as tiny light spots on the upper leaf surface, gradual discoloration of the leaf blade, and the formation of thin webbing on the underside of the leaves.

Although spider mite infestation causes general plant weakening and defoliation, the broad mite (Polyphagotarsonemus latus) is considered the primary pest in modern azalea agronomy, as it causes deformation of young shoots and flowers. Specific resistance genes to spider mites in azaleas have not been identified, and the susceptibility of cultivars is assessed solely based on phenotypic scales.

General information about the subject — on the page Spider mite.

Sources8

Varieties of Indica azalea mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.