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Attend our training to become an Invasive Shothole Borer Monitor in Los Angeles, Orange, and Ventura Counties

October 27, 2021

Invasive shothole borers (ISHB) are invasive wood boring beetles that attack numerous native and non-native trees in Southern California. These beetles mechanically damage trees by boring tunnels into trunks and branches and carry a fungal disease called Fusarium Dieback. This fungus is “farmed” by the beetles as food and supports their reproduction.

This is concerning because trees that become infected with this fungal disease are prone to branch dieback, canopy loss, and mortality. Once infected, mortality can quickly occur within 1-5 years. Infested trees become sources of beetles that can spread to the neighboring areas. The rate of spread can be drastically increased by humans if infected wood gets moved out of the infected area. This beetle-disease complex can affect hundreds of tree species in both urban and natural areas. In Southern California, drought has already weakened many trees and now they must also fight infestations!

How you can help: Knowing where beetles have spread will assist scientists and many other conservation agencies plan for management. Your participation is needed to detect early infestations in Los Angeles, Orange, and Ventura Counties.

Training for Monitors: Those in close proximity to Los Angeles, Orange, and/or Ventura counties can become trained monitors by scientists from UC Cooperative Extension. California Naturalists, Project Learning Tree Educators, and Master Gardeners are especially encouraged to attend.

Dates: The training includes one online session on October 27 from 11:00 AM - 1:00 PM, and one in-person session (you can choose from three different locations, see agenda below) on November 1, 2, or 3 from 10:00 AM - 12:00 PM.

Cost: Free.

Training Requirements: To receive the full training,

  • Attendance of online session is required.
  • Attendance to in-person session is optional, but highly recommended.
  • Completion of the 1 hour online eXtension Invasive Shotholes Borer training is required before October 27.
  • Monitors must create or already have an account on iNaturalist.
  • After the training, monitors must upload at least 5 observation to iNaturalist using the correct protocols.

Registration: Please complete the survey here.

Training Agenda:

Pre-Training Assignments:
Completion of the 1 hour online eXtension Invasive Shothole Borer training.
Create an iNaturalist account.

Online Session - Oct. 27  (11:00 AM - 1:00 PM)

Location: Virtual Zoom meeting. The meeting access information will be sent to registrants prior to October 27.

Speakers will cover how this project fits into the big picture of efforts to manage emerging tree pests in California. There will be a short review of ISHB identification, look-alikes and tree species identification, and then an overview of how to use iNaturalist for this project.

Before In-person Session Assignment:
Upload at least 1 practice observation to iNaturalist using the correct protocols.

In-Person Session:

Attendance of in-person session is optional, but highly recommended. Volunteers should pick one of the three locations/dates:

Nov. 1 (10:00 AM - 12:00 PM): Ventura County – Old Agoura Park: 5301 Chesebro Rd, Agoura Hills, CA 91301

Nov. 2 (10:00 AM - 12:00 PM): Los Angeles County – Sycamore Grove Park: 4702 North Figueroa Street Los Angeles 90042

Nov. 3 (10:00 AM - 12:00 PM): Orange County – Pioneer Park: 2565 E Underhill Ave, Anaheim, CA 92805

Speakers will review ISHB symptoms and iNaturalist collection protocols; observation of infested trees and filed identification of signs and symptoms; troubleshooting based on their experiences with the practice observation.

Nov. 8 (11am - 1pm): Online office hours - We will be available to answer any questions regarding the training, how to ID infestations, and general questions about ISHB.

Known infestation sites by county:

Ventura County:

  • CSU Channel Islands: 1 University Drive, Camarillo 93012
  • Camp Comfort County Park: 11969 North Creek Road, Ojai 93023
  • Teague Park: 300 South Steckel Drive, Santa Paula 93060
  • The Oaks: 350 West Hillcrest Drive, Thousand Oaks 91360

Los Angeles County:

  • Crescenta Valley Dog Park: 3901 Dunsmore Avenue, Glendale 91214
  • Griffith Park & Old Los Angeles Zoo: 4801 Griffith Park Drive, Los Angeles 90027
  • Shane’s Inspiration: 4800 Crystal Springs Drive, Los Angeles 90027
  • Monte Verde Park/West San Gabriel River Parkway: 4626 Shadeway Road, Lakewood 90713
  • Reseda Park: 18411 Victory Boulevard, Reseda 91335

Orange County:

  • Yorba Regional Park: 7600 East La Palma Avenue, Anaheim 92807
  • Carbon Canyon Regional Park: 4442 Carbon Canyon Road, Brea 92823
  • Pearson Park: 400 North Harbor Boulevard, Anaheim 92805
  • Ridgecrest Park: Eastwing & Aliso Creek Road - 25354 Eastwing, Aliso Viejo 92656
  • Turtle Rock Community Park & Turtle Rock Trail: 1 Sunnyhill, Irvine 92603

Beatriz Nobua-Behrmann, Ph.D.
Urban Forestry and Natural Resources Advisor, University of California Cooperative Extension – Los Angeles and Orange County


Eliot Freutel - Community Education Specialist, UC California Naturalist program, Southern California.


Julie Clark DeBlasio - Community Education Specialist, UC Cooperative Extension, Ventura Co.



Complete the survey using the link to confirm your attendance.
Deadline to register is 12:00 PM October 26th.


Questions or more information about the training can be directed to: 

Eliot Freutel - Southern California Community Education Specialist for the California Naturalist Program

Julie Clark DeBlasio - Community Education Specialist, UC Cooperative Extension, Ventura Co.


ISHB Example

ISHB Big view