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Leaf Spots, Miscellaneous

Several fungal (primarily Rosisphaerella rosicola/Cercospora and Elsinoe rosa...

8 host plants

Last updated

Data Coverage 3 of 6 dimensions
Causal Agent
Host Plants
Symptoms
Management
GDD Threshold
Regional Notes

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.

Quick Reference

Causal Agent
Several fungal (primarily Rosisphaerella rosicola/Cercospora and Elsinoe rosa...
Host Plants
8

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)