Leaf Spots, Miscellaneous
Several fungal (primarily Rosisphaerella rosicola/Cercospora and Elsinoe rosa...
8 host plants · Abiotic
Last updated
Rosa shows variable fungal leaf spots (Cercospora, Elsinoe, Cladosporium) with red margins and tan centers, progressing to yellowing and defoliation. Manage as you would black spot: space well, avoid dense shade, eliminate overhead watering, and rake fallen leaves at season's end. Remove infected foliage promptly.
In general, tactics used to manage black spot, powdery mildew, and/or rust will be effective on many leaf spotting fungi. Space or prune bushes to allow for good airflow.
What Should I Do?
- In general, tactics used to manage black spot, powdery mildew, and/or rust will be effective on many leaf spotting...
- Space or prune bushes to allow for good airflow.
- Avoid dense plantings and shaded areas.
Quick Reference
Agent Type
abiotic
Causal Agent
Several fungal (primarily Rosisphaerella rosicola/Cercospora and Elsinoe rosa...
Host Plants
8
Spread
rain-splash
Management
Cultural Controls
- In general, tactics used to manage black spot, powdery mildew, and/or rust will be effective on many leaf spotting fungi.
- Space or prune bushes to allow for good airflow.
- Avoid dense plantings and shaded areas.
- Avoid overhead watering that keeps plants wet for extended periods of time.
- Rake up and burn all leaves at season's end.
- Remove and destroy infected plant parts.
Host Plants (8)
Rosa acicularis Wild Prickly Rose Rosa gymnocarpa Little Wood Rose, Wood Rose, Baldhip Rose Rosa multiflora Multiflora Rose Rosa nutkana Nootka Rose Rosa pisocarpa Clustered Rose, Swap Rose Rosa rubiginosa Sweetbriar Rose, Eglantine Rose Rosa rugosa Rugosa Rose, Japanese Rose, Beach Rose Rosa woodsii Woods' Rose
Sources & References
Data Maturity Baseline Extension data. Expert review underway.