Decline

Pear decline

5 host plants · Phytoplasma

Last updated

Decline causes progressive weakening and death of infected plants over time. You see gradual loss of vigor, branch dieback, and eventually plant death. Many organisms and factors can cause decline. Proper tree care, stress reduction, and sometimes removal are management options.

Use resistant or tolerant rootstocks. Remove infected trees from nurseries and young orchards. There is no reliable cure once a plant is infected. Remove and destroy affected plants to prevent spread. Avoid replanting susceptible species in the same location, as the pathogen can persist in soil.

Quick Reference

Agent Type
phytoplasma
Causal Agent
Pear decline
Host Plants
5

Management

Cultural Controls

  • Use resistant or tolerant rootstocks. Remove infected trees from nurseries and young orchards. Collect hardwood cuttings or scion stock in the winter or early spring. Use the best orchard management practices, including the best possible insect and disease control, irrigation, drainage, fertilization, and pruning. Control pear psylla. See the PNW Insect Management Handbook for details. When grafti

Host Plants (5)

Sources & References

Primary: PNW Plant Disease Management Handbook

Data Maturity
Baseline Extension data. Expert review underway.