Azalea caterpillar (Datana major) clusters on limb tips in autumn, making a “C” shape when disturbed. They defoliate random branches but won’t kill the plant. Spray with Bacillus thuringiensis (Bt) or wait for hornets and wasps to prey on them. A caterpillar field guide is recommended for hobbyists.
Lichen on Azaleas: Harmless and Often Misunderstood
Caterpillars and Aphids on Petunias: Hand-Picking and Spinosad
How to Prune a Braided Azalea Topiary
Indoor Azalea Care: Light, Water, and Fertilizer
Caterpillars or Flea Beetles on Coleus? Organic Controls That Work
Azalea Varieties and Care: The Royalty of the Garden
Azalea and Rhododendron Root Rot (Phytophthora): Prevention and Resistant Varieties
Caterpillar Pests: Identification and Control
Growing Azaleas in Containers: Best Varieties and Care Tips
Attracting Catalpa Caterpillars: Sell Caterpillars with Trees
Using Old Azalea Fertilizer: Wait Until February for Safe Application
Why Cultivated Azaleas Bloom Heavily But Set No Seed
Cottonseed Meal for Azaleas: When and How Much
Azalea Pruning in Late Spring: Control Size, Shape & Rejuvenate
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