Cercospora Leaf Spot
Cercospora hydrangeae Ellis & Everh
1 host plant · Fungal
Last updated
Data Maturity Structured
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Cercospora Leaf Spot can show up on landscape plants, producing visible damage that ranges from leaf spots and discoloration to branch dieback depending on severity. Early detection gives you the best management options.
Start with sanitation: remove and dispose of affected material as you find it. Thin dense growth to improve air circulation, and redirect irrigation away from foliage. If the condition persists despite cultural adjustments, your local Extension office can help identify the pathogen and recommend targeted treatments.
Quick Reference
Agent Type
fungal
Causal Agent
Cercospora hydrangeae Ellis & Everh
Host Plants
1
Spread
rain-splash
Favorable Conditions
>
Management
Vulnerability Window
>
Cultural Controls
- Remove and destroy fallen leaves from under susceptible plants
- Avoid overhead irrigation; use drip or soaker hoses
- Improve air circulation through pruning and adequate plant spacing
- Apply urea to leaf litter after leaf fall to accelerate decomposition
- Provide partial shade (40-60%) for susceptible hydrangeas where possible
Regional Notes
[object Object]