Dwarf Weeping Cherry Gummosis: Phytophthora Management

1.5-year-old weeping cherry with jelly-like sap at trunk base; some leaves turning orange.

Diagnosis

Gummosis—often from Phytophthora fungus. Triggered by injury (mower, whip), wind damage, sun scald.

Treatment Steps

1. Prune affected branches; bag/bury debris (≥1 ft deep).
2. Scrape gum with sharp knife.
3. Cut out cankers (dark/bruised spots) to healthy green/white wood.
4. On trunk: cut away diseased bark + small healthy margin.
5. Spray copper fungicide immediately after cutting.
6. Sanitize tools (hot soapy water).
7. Keep mulch off trunk base—moisture invites recurrence.