Archive Nut, Prune and Olive Programs

Invasive reproductive host Symptoms: gumming, staining Resources: Cal-IPC, USDA Profile, US Forest Service Gumming symptoms on Tree of Heaven with a knife for scale.

Reproductive host Symptoms: staining Other pests: UC IPM Resources: USDA Profile Dried staining around PSHB entry-holes on trident maple.

Native reproductive host Symptoms: staining Other pests: UC IPM Resources: USDA Profile PSHB symptoms can be difficult to see on valley oak bark.

Reproductive host Symptoms: staining Other pests: UC IPM Resources: USDA Profile Staining from PSHB activity on weeping willow.

Native reproductive host Symptoms: staining Other pests: UC IPM Resources: USDA Profile Staining and PSHB entry-hole on white alder.

Susceptible to Fusarium dieback Symptoms: gumming, staining Other pests: UC IPM Resources: USDA Profile Olive, a non-reproductive host, responds to PSHB attack with gumming symptoms.

Reproductive host Symptoms: staining Other pests: UC IPM Resource: USDA Profile PSHB symptoms on a shiny Xylosma, also called dense logwood.

We are a joint-agency and NGO stakeholder group working in collaboration to coordinate the research, monitoring, management, regulation, and outreach and education related to the Polyphagous and Kuroshio Shothole Borers/Fusarium Dieback complex and other emerging pests of wildland and urban forests.

Word is spreading fast about ISHB, hopefully faster than the beetles themselves. Visit our US News Archive, International News Archive, or ISHB YouTube Channel to see what's being said.

If you would like to speak with someone about Polyphagous shothole borer/Fusarium dieback (PSHB/FD) or Kuroshio shothole borer/Fusarium dieback (KSHB/FD), contact your county Agricultural Commissioner or University of California Cooperative Extension.