Pine pitch canker
|Pine pitch canker|
Pitch canker affecting Monterey pine
|Common names||pitch canker of pine|
|Causal agents||Fusarium circinatum|
Infected trees may exhibit a number of symptoms, including the appearance of canker: small areas of dead tissue which grow slowly, often over a period of years. Additional symptoms include discoloration on the branches, trunk and exposed roots. The fungus infects branches from the tips down, turning needles brown, and creates a flow of amber pitch that runs down the trunk.
The disease threatens to destroy 85% of the native Monterey pine forests by 2015. The fungus is transmitted by bark, cone and twig beetles whose dispersal may carry the disease to new locations.
At this time, pine pitch canker cannot be eradicated. Officials in California have recommended that people avoid transporting infected trees or firewood from their region of origin, sterilize pruning tools with bleach before and after pruning operations, chip and spread or burn infected plant material, avoid using Monterey pines for landscape plantings, and report new occurrences of pitch canker to the California Department of Forestry and Fire Protection.
- Pine Pitch Canker - California Forest Stewardship Program
- Pitch Canker Diagnosis - California Department of Forestry
- "Pine Pitch Canker". Gallery of Pests. Don't Move Firewood. Retrieved 14 November 2011.
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