Urban Forest Insect and Disease Workshop for Santa Cruz and Monterey Area Arborists: What’s wrong with that tree? – October 27th from 10AM-3:30PM


To register online please click the link: Online Registration, the number of attendees is limited to 50 people

Registration will end on 10/23 at 5:00PM after which registration must be paid in person at the meeting by cash or check.

Registration does NOT include parking or lunch. There will be time to get lunch during the morning break. Coffee and snacks will be provided.


Meeting Location:

Felton Community Hall, 6191 Highway 9, Felton, CA 95018


Agenda and Objectives:

Agenda Overview

10:00 am to 12:30 pm – Felton Community Hall, 6191 Hwy 9, Felton, CA 95018

(Check-in available at 9:30 am)

12:30 to 3:30 pm Lunch and field stops: Henry Cowell SP, 101 N Big Trees Park Rd, Felton, CA 95018




  • Improve diagnosis and management of urban forest pests
  • Update arborists on recognitions and treatment recommendations for sudden oak death
  • Review diagnosis and management of pitch canker, other common pests




Pest infestation is often used as a justification for tree removal, so accurate pest diagnostic skills are needed to assure that removals are done appropriately. We will review ways to identify insects, pathogens and abiotic damage, how to take samples for lab evaluation and available resources to assist arborists in figuring out what’s wrong with a tree.

This training combines indoor and outdoor field stops.


We will focus on recognition and management of hardwood and conifer invasive tree pests, such as pitch canker, sudden oak death, and other urban forest health problems. Attendees will receive up-to-date information on current issues threatening local urban areas and have an opportunity to fine-tune field skills.


Preliminary Agenda

Indoors at Felton Community Hall

  9:30 am Registration – check in


10:00 am Welcome. Objectives. Workshop overview.

Susan Frankel, Plant Pathologist, USDA Forest Service, Pacific Southwest Research Station – Albany; sfrankel@fs.fed.us


10:10 am Managing Pitch Canker

– Thomas Gordon, Professor, UC Davis Plant Pathology Department, trgordon@ucdavis.edu


10:35 am Construction concerns

James Allen, owner, consulting arborist, James P. Allen & Associates, Consulting Arborists, Santa Cruz


11:00 am Look –a-likes – Can you tell what’s bothering this tree?

Chris Lee, Forest Health Specialist, California Department of Forestry and Fire Protection

Fortuna, CA, christopher.lee@fire.ca.gov


11:20 am – Effects of drought on pests and diseases of trees

Steven Tjosvold, University of California Cooperative Extension Santa Cruz and Monterey Cos. Watsonville, satjosvold@ucanr.edu


11:40 am – Sudden oak death/Phytophthora ramorum treatment update

Doug Schmidt, UCB


12:05 pm – Forest pests traveling on native plants: Phytophthora tentaculata in native plant nurseries and restoration sites

– Timothy Miles, CA State Monterey Bay


12:30 pm – Depart for Henry Cowell State Park, 101 N Big Trees Park Rd, Felton 95018, Picnic Area 1

Lunch at picnic area 1


1:30 – 3:30 pm Field stops at Henry Cowell State Park

Decay fungi and hazard trees. David Chambers, arborist and biologist, UC Cooperative Extension, Santa Cruz and Monterey Cos., dlchambers@ucanr.edu and Steve Tjosvold, UC Coop. Ext..

Sudden oak death – Kerri Frangioso, biologist, UC Davis Plant Pathology Department; kfrangioso@ucdavis.edu and Doug Schmidt, UC Berkeley

Insect pests – TBA


Workshop organizers and sponsors:

California Forest Pest Council, Pitch Canker Task Force, California Oak Mortality Task Force

USDA Forest Service – Pacific Southwest Research Station

UC Cooperative Extension – Santa Cruz and Monterey Counties

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