Avocado Tree Rusty Leaves: Spider Mite Infestation

Diagnosing the Discoloration

3-ft avocado in Texas with brown rust-like curling leaves after good growth has spider mites—two-spotted or red. They suck chlorophyll, causing bronzing/rusting. Tiny; need magnifier on leaf undersides.

Safe, Effective Treatment

Safer's Insecticidal Soap (potassium salts of fatty acids):

• Suffocates mites—no resistance buildup.
• Spray undersides thoroughly every 3–4 days × 3–4 applications.
• Available at garden centers.

Why Not Other Chemicals

Mites develop resistance to synthetics quickly. Soap is mechanical, non-toxic, and breaks the cycle with repeated applications. Early intervention saves the tree.