Non-Chemical Management
- Carefully examine plants before adding them to your landscape. Many diseases are introduced on infected planting material.
- Complete removal of one host is the only completely effective cultural control.
- Do not plant pears and junipers within 1,000 feet of each other. Most local transmission of this disease is by wind-blown spores.
- Plant only disease-resistant junipers in areas where this disease is a concern; cultivars of Juniperus squamata, J. horizontalis, and J. communis are resistant.
- Remove and destroy infected material from pear trees (fallen leaves, mummified fruit, heavily infected twigs, etc.) to help minimize disease spread. To help protect junipers, infected plant material must be removed from the pear trees before spores form, usually around late August in western Washington. This may not be practical on large trees.
- Prune out swellings or galls from junipers.
Select non-chemical management options as your first choice!