Diagnosis Complete
Black Spot (Diplocarpon rosae)
Analyzed April 29, 2026
Primary Diagnosis
Black Spot (Diplocarpon rosae)
severe
Confidence82%
Diagnostic note
Classic presentation of rose black spot disease in advanced stage. The combination of dark irregular lesions with characteristic feathery/radiating margins, surrounded by extensive yellowing halos leading to complete leaf chlorosis, is highly diagnostic. The progression from green tissue to yellow to necrotic brown at leaf tips indicates disease has been present for several weeks. Multiple leaves showing simultaneous severe symptoms suggests high spore pressure in the environment.
What the AI detected
- irregular black/dark brown lesions with feathered margins
- extensive chlorosis surrounding lesions
- yellowing of entire leaf blade
- premature leaf senescence
- lesions distributed across leaf surface
- characteristic rose leaf morphology with serrated edges
Alternative possibilities
#1Black Spot (Diplocarpon rosae)
82%#2Anthracnose
12%#3Cercospora Leaf Spot
6%Treatment plan
- 1Remove and destroy all affected leaves immediately
- 2Clear fallen debris from around plant base
- 3Apply fungicide containing chlorothalonil or myclobutanil
- 4Water at soil level to keep foliage dry
- 5Improve air circulation by selective pruning
Treatment guidance informed by published plant pathology research.
Treatment informed by peer-reviewed plant pathology research · Explore studies at consensus.app