Holly Yellow Leaves: Check for Scale Insects

Holly Yellow Leaves: Check for Scale Insects

Japanese holly with yellow leaves showing brown and silver spots: inspect leaf undersides in yellow areas for white waxy coating—indicates scale insects. If present, treat with Bayer Advanced Tree & Shrub Insect Control (imidacloprid) soil drench.

Diagnosis

• Look at underside of yellow leaves.
• White substance under yellow patches = scale.
• Scale are immobile, oval, brown, scrape off.

Treatment

If scale confirmed: systemic soil drench per label. Expensive but effective. If no scale, investigate watering, soil pH, or root issues.