Proceedings California Invasive Plant Council Symposium 2008 “The Future of Invasive Plant Management” 1 2 Proceedings California Invasive Plant Council Symposium Volume 12: 2008 “The Future of Invasive Plant Management” California State University-Chico October 2-4, 2008 3 These Proceedings are available online at www.cal-ipc.org. Contact Cal-IPC at [email protected] California Invasive Plant Council 1442-A Walnut St. #462 Berkeley, CA 94709 Copyright © 2008 by the California Invasive Plant Council Recommended citation format: Randall, John M. Learning to live with invasive plants we cannot control. Proceedings of the California Invasive Plant Council. 12:pg. Cal-IPC, Berkeley, CA. The views and opinions expressed in the articles of this publication do not necessarily reflect the position of the California Invasive Plant Council. Cover: Sutter Buttes – Field trips visited Peace Valley in the Sutter Buttes (pictured), Lassen Volcanic National Park, Big Chico Creek Ecological Reserve, and local creek restoration projects around Chico. Photo: Sara Sweetto: Sara Sweet Title page: The California Department of Food and Agriculture’s Integrated Pest Control Branch won the 2008 award for Or- ganization of the Year. Photo: Gina Darin. 4 Table of Contents * Indicates presenting author in multi-author papers. Keynote Speaker 1 The evolving people and landscapes of California Emilyn Sheffield, California State University, Chico, Chico, CA New Horizons 1 Learning to live with invasives we cannot control John Randall, The Nature Conservancy, University of California, Davis, Davis, CA Warmer and weedier? Outlook for invasive plants in a changing world Jeffrey S. Dukes, Purdue University The five stages of grief: Invasive plants and the horticulture industry Sarah Reichard, University of Washington Botanic Gardens Student Paper Contest 6 Ecological remote sensing of invasion by perennial pepperweed Margaret E. Andrew* & Susan L. Ustin, Department of Land, Air, & Water Resources, University of California, Davis, Davis, CA Using airborne remote sensing to map sweet fennel on Santa Cruz Island Kyla Dahlin*, Stanford University, Department of Biological Sciences, Stanford, CA and Carnegie Institution for Science, Department of Global Ecology, Stanford, CA, Greg Asner,, Carnegie Institution for Science, Department of Global Ecology, Stanford, CA, Chris Field, Carnegie Institution for Science, Department of Global Ecology, Stanford, CA and Rebecca Shaw, The Nature Conservancy. Prioritizing California’s A-rated weed populations for eradication Gina M. Skurka Darin*, Department of Plant Sciences, University of California, Davis, Davis, CA and California Department of Food & Agriculture, Davis, CA and Steve Schoenig, Depaartment of Fish & Game Prescribed fire and exotic plant effects on California grasslands S.J.M. Dickens*, E.B. Allen & L.S. Santiago, Departement of Botany & Plant Sciences, University of California, Riverside, Riverside, CA The role of resource heterogeneity on native plant response to invasive plant removal Robert Steers* & Edith Allen, Department of Botany & Plant Sciences, University of California, Riverside, Riverside, CA Removing exotic annual grasses in coastal dunes: Effects on native solitary ground-nesting bees Ellen Tatum, Humboldt State University, Arcatia, CA DPR Laws and Regulations 25 Herbicide registration, reregistration and use tracking: Tools to help make herbicide use safe and effective Denise Webster, California Department of Pesticide Regulation Mock DPR pesticide use monitoring inspection: Application dos and don’ts Bob Case, Contra Costa RCD, Chris Christofferson, Plumas National Forest & John Knapp, Native Range, Inc. Planning the perfect application: Making sure your application is politically correct, ecologically correct and legal Panel discussion: Bob Case, Cal-IPC and CA Native Plant Society; Rich Marovich, CA Dept. of Pesticide Regulation; Navid Khan, Butte Co. Agricultural Commissioner’s Office; Peggy Olofson, Invasive Spartina Project; Joel Trumbo, CA Dept. of Fish & Game iii Managing Invasive Plants 28 A four-step approach to Himalayan blackberry (Rubus discolor) removal Michael Rogner*, River Partners. Exotic control and habitat enhancement in Southern Californian native grasslands at an Audubon California preserve Sandy DeSimone*, Audubon’s Starr Ranch Sanctuary Perennial pepperweed (Lepidium latifolium) control in tidal marsh of San Pablo Bay Giselle Block*, US Fish & Wildlife Service, San Pablo Bay National Wildlife Refuge, Ingrid Hogle, San Francisco Estuary Ivasive Spartina Project & Renee Spenst, Ducks Unlimited Looking to the Future: Research and Prediction 36 Assessing research needs for invasive plants in California Mona Robison, California Botany & Cal-IPC Follow the weeds: Assessing the risk of future spread Elizabeth Brusati, Cal-IPC A new agenda for managing invasive species in California estuaries Edwin Grosholz* & Susan Williams, University of California, Davis, Davis, CA Research and Assessment 41 Effects of nitrogen deposition on vegetation-type conversion in Riversidean sage scrub Edith B. Allen, University of California, Riverside, Riverside, CA Assessing risks of herbicidal vegetation management in a sensitive watershed Erin Conlisk* and Susan Kegley, Pesticide Research Institute The impact of the herbicides imazapyr and triclopyr triethylamine on larval bullfrogs Joel Trumbo, California Departement of Fish & Game Monitoring a declining, hyridizing weed Ingrid Hogle, San Francisco Estuary Invasive Spartina Project Early Detection and Rapid Response 49 Invasion potential of Chinese tallow (Triadica sebifera) in California Michael J. Bower* & Clare E. Aslan, University of California, Davis, Davis, CA Steal this Protocol: The invasive plant species early detection protocol for the San Francisco Bay Area Network of National Park Andrea Williams*, Jennifer Jordan, & Elizabeth Speith, San Francisco Bay Area Network Inventory & Monitoring Program. Stop-the-spread of yellow starthistle into the Sierra Nevada mountain range: Early detection and eradication on a regional scale Wendy West*, University of Calfironia Cooperative Extension & California Department of Food & Agriculture Application of feral animal eradication techniques to invasive plants: Early detection and rapid response John Knapp*, Native Range Inc., Coleen Cory, The Nature Conservancy, Kelvin Walker, Native Range Inc., and Prohunt Inc. and Norm Macdonald, Native Range Inc. and Prohunt Inc. Learning from the Past 57 Native Californian use of fire in weed management Don Hankins, Department of Geography, California State University, Chico, Chico, CA History of herbicide use and development of herbicide resistance Scott Steinmaus, Biological Sciences Department, California State Polytechnic University, San Luis Obispo, CA iv Discussion Group Notes 63 Careers in Wildland Weed Research And Management Weed management contractors: Future markets and needs Weed control: Riparian weeds Weed control: Brooms and other woody invasives Upland invaders Future research needs for invasive plants Ensuring successful weed control: Planning and monitoring Weed control: Aquatic weeds Poster Session 89 Student Poster Contest Evaluating the potential for spread of an invasive forb, Limonium ramosissimum, in San Francisco Bay salt marshes Gavin Archbald* & Katharyn Boyer, San Francisco State University, San Francisco, CA Effects of disturbance of biological soil crusts on the emergence of exotic plants in California sage scrub Rebecca R. Buenafe* & Darren R. Sandquist, California State University at Fullerton, Fullerton, CA Soil biota facilitate invasion within microhabitats in a California coastal prairie Taraneh Emam*, Mills College, Oakland, CA, Bruce Pavlik , Mills College, Oakland, CA and Peter Alpert, University of Massachusetts at Amherst, Amherst, MA Interactive effects of population genetic diversity and resident community composition on the success of an annual exotic invasive species Heather McGray*, Marlyse Lombardo & Katharine N. Suding, University of California, Irvine, Irvine, CA Spatial patterns in native and exotic submersed aquatic plant species in the Sacramento-San Joaquin River Delta Maria J. Santos*, Center for Spatial Technologies & Remote Sensing, &, University of California, Davis, Davis, CA, Lars W. Anderson, US Department of Agriculture, Agricultural Research Service, Exotic & Invasive Weed Research and Susan L. Ustin, Center for Spatial Technologies & Remote Sensing, &, University of California, Davis, Davis, CA An analysis of the seedbank at Joshua Tree National Park in sites invaded by exotic grasses Heather Schneider* & Edith Allen, University of California, Riverside, Riverside, CA Patterns of change in water hyacinth distribution in the Sacramento-San Joaquin Delta Khanna Shruti*, Maria J. Santos, Erin L. Hestir, Jonathan A. Greenberg, & Susan L. Ustin, Center for Spatial Technologies & Remote Sensing, University of California, Davis, Davis, CA Contributed Posters Results from the use of a novel method, HydroMechanical Obliteration, at the Golden Gate National Recreation Area in West Marin Maria Alvarez*, Golden Gate National Recreation Area, Cameron Colson, CAMCO, Maria Morales, CAMCO, Liz Ponzini, Golden Gate National Parks Conservancy, Aliza Segal, Golden Gate National Recreation Area, and Sarah Cusser, Golden Gate National Recreation Area San Luis Rey River flood risk management area giant reed eradication Raquel Atik*, RECON Environmental, Italia Gray, RECON Environmental, Peter Tomsovic, RECON Environmental