Pacific Northwest Plant Disease Management Handbook

Sweet Gum (Liquidambar spp.)-Cankers and Diebacks

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Latest revision: 
March 2024

Note: There are almost no reported fungi on sweet gums in the PNW. The OSU Plant Clinic has found a few fungi that tend to be opportunistic on injured shoots and branches. Injuries may be due to such events as winter injury. These fungi include Cytospora and Nectria. The Botryosphaeria canker found in eastern and southern states has not been found in the PNW.

Pscheidt, J.W., and Ocamb, C.M. (Senior Eds.). 2024 Pacific Northwest Plant Disease Management Handbook.
© Oregon State University.

Use pesticides safely!

  • Wear protective clothing and safety devices as recommended on the label. Bathe or shower after each use.
  • Read the pesticide label—even if you’ve used the pesticide before. Follow closely the instructions on the label (and any other directions you have).
  • Be cautious when you apply pesticides. Know your legal responsibility as a pesticide applicator. You may be liable for injury or damage resulting from pesticide use.

Trade-name products and services are mentioned as illustrations only. This does not mean that the participating Extension Services endorse these products and services or that they intend to discriminate against products and services not mentioned.

H - Home garden packaging commonly available.     O - Acceptable in organic production.