symptoms
Symptoms
- circleBrown, circular leaf spots with dark edges
- circleBlack streaking on stems
- circleRapid, patchy leaf drop leaving bare sections in the plant
help
Causes
Caused by the fungi Calonectria pseudonaviculata or Calonectria henricotiae, which thrive in warm, humid, still air and spread via water splash, tools, and contaminated plant material.
healing
Treatment
Prune out and destroy infected branches, clear fallen leaves from around the plant, and apply a labeled fungicide as part of an ongoing management program.
shield
Prevention
Improve airflow by thinning dense growth, avoid overhead watering, disinfect tools between plants, and consider resistant boxwood cultivars or alternatives in high-risk areas.