Thank you for joining us at the 2024 Cal-IPC Symposium! More than 600 participants gathered online to share the latest in invasive plant management and research in California.

Each video features a full session or workshop, with minor editing to remove “deadspace” at opening of sessions. Posters and PowerPoint presentations will be posted in PDF format on the 2024 Cal-IPC Symposium page in our archive.

Statewide WMA Meeting

(0:00) Planning an effective approach for controlling tree-of-heaven (Ailanthus altissima) — Ed King, Solano County Agricultural Commissioner

(21:35) Control techniques for tree-of-heaven — Katherine Holmes, Solano Resource Conservation District

(39:37) IPM for EDRR target species: How to control each of these weeds that are new to the state

• (39:55) Shiny geranium management in northwestern California — Patrick Hoffman, Humboldt CAC / Humboldt WMA Co-chair
• (56:13) Garlic mustard EDRR in Southern California — Chris McDonald, PhD, UC Cooperative Extension
• (1:04:33) Garlic mustard (Alliaria petiolate): An update from Trinity County, CA — Jim Belsher, Shasta-Trinity National Forest
• (1:11:28) EDRR for Desert knapweed (Volutaria tubuliflora) / Volutaria in Southern California — Chris McDonald, PhD, UC Cooperative Extension

(1:25:39) CDFA Weed Management Area (WMA) Update — David Kratville and Trevor Fox, PhD, California Dept. of Food & Agriculture

(1:50:41) Monitoring Invasive Plant Management –– Nikki Valentine and Doug Johnson, Cal-IPC

Concurrent Workshops & Panel Discussion

Workshop: Weeds 101: Principles of invasive plant management 

Moderated by Lauren Quon, Cleveland National Forest; Tom Reyes, California Native Plant Society

Workshop: Weeds 201: Effective invasive plant management

Moderated by Rachel Kesel, California State Parks

Workshop: Using WeedCut to help design your IPM approach 

Moderated by Jutta Burger, Cal-IPC; Tom Getts, UC Cooperative Extension; Chris McDonald, PhD, UC Cooperative Extension

Workshop: Mapping wildland weeds in Calflora 

Moderated by Pete Frye, California Weed Manager Trainer; Cynthia Powell, Calflora Executive Director

Panel Discussion: Equity in field safety

Moderated by Marion Anthonisen, Golden Gate National Parks Conservancy; Sarah Godfrey, Map the Point Consulting; Claire Meyler & Constance Taylor, Cal-IPC

Panelists: Dulce Cortez, Laguna Canyon Foundation; Erika Herrera, Laguna Canyon Foundation; Sarah Kimball, UC Irvine; Olivia Parra, UC Davis; Cris Sarabia, Palos Verdes Peninsula Land Conservancy; Michael Viramontes, Rivers and Lands Conservancy

Herbicide Laws & Regulations

(0:00) Do the right thing! Common mistakes in wildland weed applications and how to correct them — LeeAnne Mila, El Dorado County Agricultural Commissioner

(36:21) Herbicide drift: Dynamics and management — Dr. Kassim Al-Khatib, UC Davis

(1:03:48) Laws and regulations: Pesticide adjuvants — Krista Hoffman, California Department of Fish and Wildlife

(1:33:20) Herbicides are applied to sites: What does that even mean? — Chris McDonald, PhD, UC Cooperative Extension

Session 1: Prevention: The First Step in Protecting Resources

(0.00) Cal-IPC updates — Doug Johnson, Cal-IPC

(10:47) Comprehensive pest prevention program analysis — Claudia Vasquez, CDFA

(39:54) A sustainable future for pest management — Sapna Thottathil, Department of Pesticide Regulation

(1:05:48) Working together against weeds: Strategies for developing effective best management practices to prevent invasive species spread in California’s National Parks — Brent Johnson, National Park Service

Session 2: Protecting Rare Plants and Habitats

(0:00) Integrating early detection of invasive plant and rare plant management – Rare monkeyflowers of Ackerson Meadow, Yosemite National Park as a case study — David Campbell, Yosemite National Park

(22:03) Dune Protected Area Network: An approach to recover listed species and protect rare coastal ecosystems –Lindsey Roddick, Land Conservancy of San Luis Obispo

(43:20) A case study: Creating and using a vegetation map for management of a Department Wildlife Area — Allegra Davis, California Department of Fish and Wildlife

Session 3: Aquatic and Wetland Invasive Plant Management

(0:00) Growth and response of four Vallisneria taxa to aquatic herbicides — Jens Beets, USDA- ARS

(18:28) Aquatic invasive plants and the Hydrilla eradication program — Trevor Fox, California Department of Food and Agriculture

(39:14) Restoration of coastal dunes and salt marsh at the Ocean Ranch Unit of the Eel River Wildlife Area, Humboldt County— Kelsey McDonald, California Department of Fish and Wildlife

Session 4: Grassland Restoration

(0.00) An assessment of native seed needs and the capacity for their supply: National Academies Report— Susan Harrison, UC Davis

(20:37) Native grass establishment as a form of weed control – Looking back 25 years later — April Damanti, River Partners

(40:24) Timed mowing in combination with broadcast seeding increases native plant coverage in a California grassland — Esther Cole Adelsheim, UC Davis

Session 5: Lightning Talks 

Moderator: Lauren Quon, Cleveland National Forest

(1:29) Monarch recovery initiative: Gearing up to establish 15-million milkweed by 2030 — Halie Goeman, River Partners

(6:14) Adaptive management of invasive aquatic vegetation in the Delta: Successes and challenges — Elizabeth Brusati, Delta Stewardship Council

(10:56) Take the long view: Encouraging native revegetation after jubata grass (Cortaderia jubata) removal — Leah Lord, Marin Water

(15:55) Audience questions

(21:49) Evaluating intraspecific variation to restore climate-resilient populations — Joanna Tang, University of California

(26:49) Root of the problem: Root functional traits to determine grass productivity — Karen Situ, UC Davis

(31:33) Evaluating roadside grass restoration success after multiple decades — Kees Hood, California State Polytechnic University, Humboldt

(36:44) Audience questions

(40:40) Soil moisture under different grassland cover types — Katherine Brafford, UC Davis

(45:49) Pesticide application and its effects on soil decomposition and microbial communities — Tessa Hospod, University of Connecticut

(51:17) Post fire recovery of plant community assembly in Joshua tree woodlands — Yanina Aldao Galvan, University of California Riverside and Mojave Desert Land Trust

(56:27) Audience questions

(1:00:07) Scaling up, studying and financing eucalyptus tree removal: Strategies and techniques for processing massive amounts of woody material and site restoration — Mary Paul, Elkhorn Slough Preserve; Kevin Contreras Elkhorn Slough Foundation

(1:05:12) The ivy complex — Josiah Clark, Habitat Potential

(1:10:20) Complexity in the city: Effects of urban environmental heterogeneity on the life history traits of Centaurea melitensis across California— Anthony Dant, University of Arizona

(1:15:43) Audience questions

(1:19:35) Test Plot: Community-based landcare — Jennifer Wai-Kwun Toy, UC Berkeley

(1:24:07) Project A.R.I.S.E.: AI-assisted removal of invasive species for environmental restoration — Sophie Zeng and Grace Yao, Project A.R.I.S.E.

(1:27:52) Audience questions

Session 6: Lessons Learned

(0:00) Lessons learned from an interdisciplinary evaluation of long-term restoration outcomes on 37 restored coastal grasslands in California — Justin Luong, Cal Poly Humboldt

(21:25) Riding the invasion curve: Invasive plant management on Santa Catalina Island — Aaron Kreisberg, Catalina Island Conservancy

(41:24) Invasive species control for the restoration of coastal endangered and threatened bird and butterfly species habitat — Chris Sarabia, Palos Verdes Peninsula Land Conservancy

(1:02:04) Evaluating the EDRR process for aquatic weeds — Christine Whitcraft, CSU Long Beach

Session 7: New Arrivals and Expansions + Weed Alerts

(0:00) Weed alerts and inventory updates for 2024 — Jutta Burger, Cal-IPC and Ron Vanderhoff, CNPS Orange County

(28:37) Garlic mustard: An update from Trinity County, CA — James Belsher, US Forest Service

(40:16) If you don’t know, then know where to go: Sleuthing reveals a new population of desert knapweed (Volutaria tubuliflora) in San Diego County— Tracie Nelson, California Department of Fish and Wildlife

(54:51) The recent appearance and successful eradication of barbed goatgrass (Aegilops triuncialis) at a Southern California nature preserve— Sandy DeSimone, Audubon Starr Ranch Sanctuary

(1:05:50) Teamwork makes the dream work in Caulerpa eradication efforts in California— Cyndi Dawson, California Department of Fish and Wildlife

(1:18:45) Tumbleweeds species and invasion: Old, new, and nascent — Debra Ayres, California Native Plant Society El Dorado

Session 8: Monitoring and Data Driven Adaptive Management

(0.00) Leveraging monitoring data to inform weed management in the world’s largest urban national park — Justin Valliere, UC Davis

(20:57) Yosemite’s response to disjunct weed populations: An EDRR story — Trevor Danson, National Park Service

(40:38) The effects of invasive goatgrass control on serpentine wildflowers and pollinators — Rebecca Nelson, UC Davis

Session 9: Geospatial Technologies and Approaches in Invasive Plant Mapping and Management

(0.00) Immersed in vegetation: Using high resolution drone imagery to understand the effect of vegetation on fish monitoring in the Yolo Bypass — JT Casby, Department of Water Resources

(18:55) Demystifying Esri field apps: Tips and tricks for success! — Sarah Godfrey, Map the Point Consulting

(38:29) Assessing invasive plant risk and climate vulnerability to sensitive habitats in the California Central Coast region — Nikki Valentine, Cal-IPC

Session 10: Indigenous Stewardship and Tribal Perspectives

(0:00) Good fire at Acjachemen “Junco” Meadow — Rosa-Lee Jimenez, Region 5 US Forest Service and Lauren Quon, Cleveland National Forest

(24:57) Indigenous cultural practices and modern-day pesticide use — Diania Caudell, Sage Environmental Group

Session 11: Art and Weeds

(0:00) Transforming purple nutsedge: Sustainable textile applications from an invasive plant — Cindy Cordoba-Arroyo, PhD, California State Polytechnic University, Pomona

(18:19) Invasive pigments as a catalyst for environmental engagement — Elissa Callen, Ecological Artist

(33:22) The radical land practice of attunement: Invasive plant management on a San Francisco serpentine outcropping as an art practice — Elena Fox, Terremoto

(45:22) Audience questions

Session 12: Herbicide Hot Topics + Awards

(0:00) Awards

(13:27) Herbicide Fundamentals — Tom Getts, UC Agriculture and Natural Resources

(37:49) How California regulates herbicides — Bryan George, Department of Pesticide Regulation

(57:02) Community challenges to the use of herbicide for conservation in Laguna Beach, CA — Alan Kaufman, Laguna Canyon Foundation