Non-Chemical Management
- Berckmann's arborvitae (Platycladus orientalis var. conspicua 'Berckmannsii') is especially susceptible. American and European arborvitae are not infected.
- Prune out and destroy infected branchlets and twigs.
- Avoid overhead watering.
- Provide proper culture. Arborvitae plants require good drainage and air circulation to remain healthy.
Select non-chemical management options as your first choice!