Leaf Spot in Photinia
Red Robin photinia is an evergreen shrub or small tree with striking red new growth in spring and summer. Circular or irregular spots on leaves caused by fungal or bacterial infection. Spots may be brown, black, yellow, or tan, often with a yellow halo.
Photinia care requirements
These care conditions are most relevant to leaf spot in Photinia. Check each one as a potential cause.
Symptoms to look for in Photinia
- fiber_manual_recordCircular or angular spots on leaves in shades of brown, black, or tan
- fiber_manual_recordYellow halo surrounding the spots
- fiber_manual_recordSpots merging in severe infections, causing large dead areas
- fiber_manual_recordPremature leaf drop in badly affected plants
Common causes in Photinia
- fiber_manual_recordFungal pathogens spread by water splash or wind
- fiber_manual_recordBacterial infection, especially in warm, wet conditions
- fiber_manual_recordOverhead watering keeping foliage wet
- fiber_manual_recordPoor air circulation
- fiber_manual_recordInfected plant debris left around the plant
How to diagnose leaf spot in Photinia
Examine spot edges — fungal leaf spot often has a dark border; bacterial spots may have a water-soaked appearance. Send a sample for lab identification if treatment is not working.
How to treat leaf spot in Photinia
Remove and dispose of affected leaves. Improve air circulation. Apply a copper-based fungicide or neem oil spray. Avoid wetting foliage when watering.
Preventing leaf spot in Photinia
Water at the base rather than overhead. Space plants adequately for air flow. Clear fallen leaves regularly. Choose resistant varieties where available.