Invasive Shot Hole Borers
Invasive Shot Hole Borers
Invasive Shot Hole Borers
University of California
Invasive Shot Hole Borers

Host Species

Reproductive hosts are tree species that are capable of 1) supporting beetle reproduction and 2) growing the fungi that cause Fusarium Dieback. The species below have been confirmed by UC Cooperative Extension Plant Pathologist Dr. Akif Eskalen. As research continues, these lists may change. Check back for the most recent updates.

* Indicates species native to California

Source: Eskalen, A. (November 2016). Eskalen Lab: Fusarium Dieback/PSHB and KSHB [List]. Retrieved from

Reproductive Host Species for PSHB

Click on a species name for symptom photos and other resources.

  1. Box elder (Acer negundo)*
  2. Big leaf maple (Acer macrophyllum)*
  3. Evergreen maple (Acer paxii)
  4. Trident maple (Acer buergerianum)
  5. Japanese maple (Acer palmatum)
  6. Castor bean (Ricinus communis)
  7. California sycamore (Platanus racemosa)*
  8. Mexican sycamore (Platanus mexicana)
  9. Red willow (Salix laevigata)*
  10. Arroyo willow (Salix lasiolepis)* 
  11. Avocado (Persea americana)
  12. Mimosa/Silk tree (Albizia julibrissin)
  13. English oak (Quercus robur)
  14. Coast live oak (Quercus agrifolia)*
  15. London plane (Platanus x acerifolia)
  16. Fremont cottonwood (Populus fremontii)*
  17. Black cottonwood (Populus trichocarpa)*
  18. White alder (Alnus rhombifolia)*
  19. Titoki (Alectryon excelsus)
  20. Engelmann oak (Quercus engelmannii)*
  21. Cork oak (Quercus suber)
  22. Valley oak (Quercus lobata)*
  23. Coral tree (Erythrina corallodendron)
  24. Blue palo verde (Cercidium floridum)*
  25. Palo verde (Parkinsonia aculeata)*
  26. Moreton Bay chestnut (Castanospermum australe)
  27. Brea (Cercidium sonorae)
  28. Mesquite (Prosopis articulata)*
  29. Weeping willow (Salix babylonica)
  30. Chinese holly (Ilex cornuta)
  31. Camellia (Camellia semiserrata)
  32. Acacia (Acacia spp.)
  33. Liquidamber/American sweetgum (Liquidambar styraciflua)
  34. Red flowering gum (Eucalyptus ficifolia)
  35. Japanese wisteria (Wisteria floribunda)
  36. Goodding's black willow (Salix gooddingii)*
  37. Tree of heaven (Ailanthus altissima)
  38. Kurrajong (Brachychiton populneus)
  39. Black mission fig (Ficus carica)
  40. Japanese beech (Fagus crenata)
  41. Dense logwood/Shiny xylosma (Xylosma congestum)
  42. Mulefat (Baccharis salicifolia)*
  43. Black Poplar (Populus nigra)
  44. Carrotwood (Cupaniopsis anacardioides)
  45. California buckeye (Aesculus californica)*
  46. Canyon Live oak (Quercus chrysolepis)*
  47. Kentia Palm (Howea forsteriana)
  48. King Palm (Archontophoenix cunninghamiana)
  49. Tamarix (Tamarix ramosissima)


Reproductive Host Species for KSHB

Click on a species name for symptom photos and other resources.

  1. Avocado (Persea americana)
  2. California sycamore (Platanus racemosa)*
  3. Coast live oak (Quercus agrifolia)*
  4. Cork oak (Quercus suber)
  5. Draft coral tree (Erythrina humeana)
  6. Black poplar (Populus nigra)
  7. Black locust (Robinia pseudoacacia)
  8. Red willow (Salix laevigata)*
  9. Arroyo willow (Salix lasiolepis)*
  10. Fremont cottonwood (Populus fremontii)*
  11. Mimosa/Silk tree (Albizia julibrissin)
  12. Castor bean (Ricinus communis)
  13. Black Willow (Salix nigra)*
  14. Strawberry Snowball Tree (Dombeye cacuminum)
  15. Mulefat (Baccharis salicifolia)*

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