Leaf and Stem Blight
Pseudonectria buxi (asexual: Volutella buxi) and P
2 host plants · Fungal
Last updated
This profile contains verified disease data from extension databases. Regional field notes and expert review are in progress.
Pachysandra foliage develops blotches and twigs die back, with visible fungal fruiting bodies. Pseudonectria buxi and related fungi attack stressed or injured plants. Prune out dead growth, improve drainage, minimize humidity above 85%, and ensure good air circulation. Maintain proper soil pH (6.8-7.5) and provide light shade.
Remove blighted tissue promptly, cutting well below visible symptoms. Improve air circulation by thinning dense growth. Avoid overhead watering, especially during bloom and new growth periods when tissues are most susceptible. For recurring problems, preventive fungicide applications timed to protect new growth can reduce infection, but cultural controls should be your first approach.
Quick Reference
Management
Fall through spring in cool wet climates (September-May). Spring in temperate regions (March-May). Overwinters on infected leaf and branch material.
Cool wet conditions; rain splash and dew on foliage. Optimal temperatures 15-20°C (59-68°F). Infection requires extended leaf wetness.
Cultural Controls
- Prune out and burn dead branches
- Remove dead leaves from crotch areas inside canopy
- Minimize wounding when new growth is present
- Maintain good air circulation
- Improve drainage
- Avoid high humidity (>85%)