Fire Blight in Photinia Hedge: Identification and Management

Symptoms Point to Vascular Disease

A 10-foot photinia in a 6-plant hedge in Oregon turned orange and died after a wet winter. Others show dull red leaves (not new growth). Black spot is present but not the killer.

Why It's Fire Blight, Not Leaf Spot

Fire blight attacks the vascular system, causing rapid wilting, orange/red discoloration, and death. Leaf spot only causes spotting and defoliation.

Management Strategy

• Prune Out Dead Wood: Cut well into healthy tissue. Sterilize tools with bleach between cuts.
• Spring Copper Fungicide Spray: Protects emerging growth.
• Fertilize for Vigor: Healthy plants resist infection better.

Long-Term Outlook

Fire blight is difficult to eradicate. Vigilant sanitation and cultural care can prolong the hedge's life. Consider replacing with resistant species if losses continue.