White Cottony Growth on Burning Bush: Woolly Aphids or Powdery Mildew?

Two Possibilities

Woolly aphids: White, cottony, mobile; leave sticky honeydew. Shake branch to see movement.
Powdery mildew: Static white powder on leaves/stems; no honeydew.

Aphids: Bayer Advanced Tree & Shrub Insect Control (soil drench).
Mildew: Fungicides (triadimefon, triforine, thiophanate-methyl, propiconazole) at first sign, repeat per label.

Correct ID ensures right treatment.

Plant Diseases: Ligustrum Leaf Issues: Diagnosing Tiny Leaves and Browning in Florida; Variegated Holly Losing Lower Leaves: Scale and Chlorotic Shoots; Sticky Residue on Stephanotis: Honeydew and Sooty Mold; Gardenia Leaf Curl and Powder After Insecticide Spray; Rose Bush Powdery Mildew: Atomic Grow for Bloom Explosion; Bougainvillea Fungal Leaf Spot: Diagnosis and Recovery Plan; Scale Insects on Holly: Systemic Treatment vs. Horticultural Oil; Yucca Natural Leaf Drop vs. Nutrient Deficiency; Schefflera Dropping Leaves? Check Watering and Root Health; Replanting After Holly Removal: Dealing with Scale and Sooty Mold Residue

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