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Workgroup Information


Summary Develops collaborative research and extension projects and collects and disseminates information on the culture, management, and production of almonds in California.
Workgroup Chair Information
Name Franz Niederholzer (Chair)
Phone (530) 458-0570
Unit: Colusa County
Location: Cooperative Extension Colusa County
PO Box 180, 100 Sunrise Boulevard
Suite E
Colusa, 95932
Membership List
Joyce, Andrea UC Merced
  Assistant Professor in Entomology Entomology
AES Scientist
Adaskaveg, James Plant Pathology
  Professor and Plant Pathologist (test editing) Mycology, plant pathology, ecology and epidimiology of fungi (test edits)
Brown, Patrick Department of Plant Sciences
  Pomologist-AES, Professor of Plant Nutrition Plant mineral nutrition; root soil interaction; rhizosphere dynamics and genetic aspects of plant nutrition; function of boron in plants; sustainable agriculture
CHIU, JOANNA Entomology (UCD)
  Assistant Professor
Dahlke, Helen Land, Air & Water Resources
  Associate Professor in Integrated Hydrologic Sciences physical hydrology, surface water - groundwater interactions, groundwater recharge, on-farm recharge, nutrient transport, stochastic hydrology, DNA tracer technology
Dandekar, Abhaya Department of Plant Sciences
  Professor Geneticist-AES Molecular, biochemical, genomic and epigenetic analysis of tree fruit and nut genetic and biochemical traits to improve management strategies
Gradziel, Thomas Department of Plant Sciences
  Professor, Geneticist-AES Genetics and breeding of peach and almond
Kisekka, Isaya Land, Air & Water Resources
  Assistant Professor and Assistant Irrigation Engineer in AES Irrigation Management and Agricultural Water Management
MacDonald, James Plant Pathology - CAES
  Professor Emeritus and Plant Pathologist in the AES, Emeritus Root diseases of nursery and perennial crops
Michailides, Themis Kearney Agricultural Research & Extension Center
  Plant Pathologist and Lecturer Ecology, epidemiology and control of fungal diseases of fruit and nut crops and vines, postharvest diseases, aflatoxin and mycotoxins of nut crops and figs.
Millar, Jocelyn Entomology (UCR)
  Entomologist   Professor Insect behavior; identification, synthesis, and testing of insect kairomones and pheromones; insect acoustic signaling
Mills, Nicholas Environmental Science, Policy and Management (ESPM)
  Professor Entomologist-AES Biological control of insect pests, ecology and insect parasitoids, tree fruit pests
Polito, Vito Department of Plant Sciences
  Professor   Pomologist-AES Chairman   Department of Pomology   Davis Reproductive biology of tree-crop species: olive, walnut, pistachio, almond and other Mediterranean tree crops
Shackel, Kenneth Department of Plant Sciences
  Professor/Pomologist-AES Plant-based irrigation management, particularly in trees and vines. Use of the pressure chamber and stem water potential (SWP) as a measure of plant stress, and the use of stress to optimize productivity and save water.
Volder, Astrid Department of Plant Sciences
  Professor Root biology, tree systems, whole plant physiology, climate change
CE Advisor
Beede, Robert Kings County
  (Retired) Farm Advisor Emeritus Horticulture: Tree fruit, nuts, grapes
Bentley, Walter Kearney Agricultural Research & Extension Center
  Integrated Pest Management Entomologist, Emeritus Entomology
Buchner, Richard Tehama County
  Orchard Advisor - Emeritus Pomology for Tehama County. Strawberry nursery production in North Coast & Mountain Region
Caprile - Emeritus, Janet Contra Costa County
  Farm Advisor Commercial fruit, nut, vine, vegetable, field, specialty crops
Connell, Joseph
  Farm Advisor Emeritus Almonds, olives, citrus, subtropicals, ornamentals
Coviello, Richard Fresno County
  Farm Advisor, Emeritus Entomology, pest management
Culumber, Mae Fresno County
  Nut Crops Farm Advisor
Doll, David Merced County
  Pomology Farm Advisor Almonds, Pistachios, Walnuts, and Urban Forestry
Duncan, Roger Stanislaus County
  Pomology Farm Advisor Almonds, canning peaches, pistachios, misc. tree fruit
Edstrom, John Colusa County
  Farm Advisor emeritus Almonds
Fichtner, Elizabeth Tulare County
  Farm Advisor Orchard Systems
Freeman, Mark Fresno County
  Farm Advisor Nut crops--almond, walnut, pistachio, pecan; citrus--orange, lemon, mandarin; olive
Fulton, Allan Glenn County
  Irrigation and Water Resources Advisor
Gordon, Phoebe Madera County
  Orchard Crops Farm Advisor Madera County: Almonds, pistachios, stone fruit, figs Merced County: Pistachio and figs
Haviland, David Kern County
  Farm Advisor Entomologist and Pest Management. Advise in identification and control of Pest.
Holtz, Brent San Joaquin County
  County Director and Farm Advisor Pomology, deciduous tree fruits and nuts, plant pathology, Whole Orchard Recycling
Ingels, Chuck Capitol Corridor MCP Cooperative Extension
  Farm Advisor Tree crops, grapes, environmental horticulture, and Master Gardeners/urban horticulture. Areas of research and extension focus include IPM, evaluation of sustainable products and practices, water conservation and deficit irrigation, home orchards and vineyards, sustainable landscaping, alternative turfgrass species, and tree training, pruning, and grafting.
Jarvis-Shean, Katherine Capitol Corridor MCP Cooperative Extension
  Orchard Systems Advisor
Krueger, William Glenn County
  Farm Advisor Emeritus All tree crops in Glenn County and olives in Tehama County, integrated pest management
Lightle, Dani Tehama County
  Orchard Systems Advisor
Milliron, Luke Butte County
  Orchard Systems Advisor
Niederholzer, Franz Colusa County
  Farm Advisor   Orchard Systems Prunes, almonds, pears, apple, cherry, olive, plum, citrus, and pomegranate
Pickel, Carolyn Integrated Pest Management (IPM) Statewide Program
  Area IPM Advisor, Emeritus IPM programs
Retired - Coates, William Santa Clara County
  Farm Advisor Emeritus (retired) - Pomology (San Benito, Santa Cruz, Santa Clara, Monterey Counties) Pomology - Tree Fruit and Nut Crops
Rijal, Jhalendra Stanislaus County
  Area IPM Advisor Entomology, insect pest management, insect mating disruption, insect spatial distribution and quantitative sampling, insect behavior and chemical ecology
Symmes, Emily Tehama County
  Area IPM Advisor Integrated pest management
Tollerup, Kris Kearney Agricultural Research & Extension Center
  Cooperative Extension Advisor, IPM Almond, Pistachio, Tree Fruit, Grapes
Verdegaal, Paul San Joaquin County
  Farm Advisor, Emeritus Viticulture, almonds
Viveros, Mario Kern County
  Farm Advisor Deciduous tree fruits, nuts, Spanish-speaking
Yaghmour, Mohammad Kern County
  Area Orchard Systems Advisor
CE Specialist
Bali, Khaled Kearney Agricultural Research & Extension Center
  Irrigation Water Management Specialist Irrigation and water management, irrigation systems, soil salinity, drainage, infiltration, water quality, TMDL, biosolids
Crisosto, Carlos Kearney Agricultural Research & Extension Center
  CE Postharvest Physiologist Extension and research on postharvest biology and technology of fruits; fruit and nuts quality and deterioration and handling systems
Daane, Kent ESPM - Organisms and the Environment
  CE Specialist Biological control and IPM of insect pests in perennial crops (almond, grape, stone fruit, olives, pistachios), annual crops (lettuce) and ornamentals (eucalyptus, ornamental).
Donis-Gonzalez, Irwin Biological & Agricultural Engineering
  Assistant Postharvest Engineering Specialist in Cooperative Extension
Goldhamer, David Hydrology Program
  CE Water Management Specialist Water management of horticultural crops, regulated deficit irrigation, plant water relations, plant-based water status sensors
Goodrich, Brittney Agricultural & Resource Economics
  Assistant Cooperative Extension Specialist Economics of Sustainable Agricultural Management, Risk and Uncertainty, Pollination Economics
Johnson, Marshall Entomology (UCR)
  IPM Specialist and Research Entomologist, Emeritus Integrated pest management of grapes, stone fruit, almonds and walnuts; biological control of arthropods; pesticide resistance in pests and natural enemies
Lampinen, Bruce Department of Plant Sciences
  Integrated Orchard Management, Walnut and Almond Specialist Integrated Orchard Management with an emphasis on walnuts and almonds
McKenry, Michael Nematology Department
  Emeritus Nematologist and CE Nematology Specialist, Emeritus Field pathogenicity and practical control of nematodes in perennial crops
Mitcham, Elizabeth Department of Plant Sciences
  Director, Postharvest Center Postharvest physiology and technology of fruit and nut crops; emphasis on maintaining flavor quality after harvest, enhancing consumption of produce, and reducing food loss. Also studying regulation of fruit ripening and mechanisms underlying calcium def
Nino, Elina Entomology (UCD)
  Assistant Specialist in CE Apiclture
Prichard, Terry Land, Air & Water Resources
  CE Irrigation  Water Management Specialist Irrigation water management, crop response to limited water supplies, water infiltration, Delta water quality and soil salinity issues
Schwankl, Lawrence Kearney Agricultural Research & Extension Center
  CE Irrigation Specialist, Retired Irrigation engineering, design, operation and management of irrigation systems, soil moisture monitoring, low-volume irrigation
Trouillas, Florent Plant Pathology - CAES
  Associate Cooperative Extension Specialist Fruit and Nut Crops, Plant Pathology
VanSteenwyk, Robert Environmental Science, Policy and Management (ESPM)
  CE Entomologist Deciduous fruits, nuts and vines
Westphal, Andreas Kearney Agricultural Research & Extension Center
  UC Riverside Associate Professor of Cooperative Extension Nematology Applied Nematology in perennial crops including walnut, almond, pistachio, grape and citrus
Wilson, Sam Entomology (UCR)
  Assistant Cooperative Extension Specialist Orchard/vineyard IPM, insect ecology, organic agriculture, agroecology
Zalom, Frank Entomology (UCD)
  Distinguished Professor and CE Specialist Fruit and Vegetable Crop Entomology; Integrated Pest Management
Other ANR
Hendricks, Lonnie Merced County
  Farm Advisor, Emeritus
Metcalf, Samuel
Meyer, Roland Land, Air & Water Resources
  CE Soils Specialist Emeritus Soil fertility-plant nutrition, efficiency of fertilizer use, pollution of environment by waste products and fertilizers, application of fly ash and other wastes on forest and agricultural lands, water quality evaluation and concerns, soil-water-plant nutrient interactions and their effect on plant growth
Micke, Warren Department of Plant Sciences
  Emeritus   CE Pomologist Cultural practices and production problems of almonds and walnuts.
O Reil, Wilbur
  Farm Advisor (Emeritus)
Rumsey, Thomas Biological & Agricultural Engineering
  Professor Emeritus Food engineering; drying of cereal and nut crops; mathematical modeling.
Browne, Greg Plant Pathology - CAES
  USDA Research Plant Pathologist Soil-borne diseases of fruit and nut trees and other horticultural crops
Chen, Jianchi USDA ARS San Joaquin Valley Agricultural Science Center
  Plant Pathologist
Curtis, Robert
  Director, Agricultural Affairs, Almond Board of California
Malkin, Richard
  Professor Emeritus Photosynthesis: energy transduction in biological membranes
Kluepfel, Daniel Plant Pathology - CAES
Krugner, Rodrigo USDA/ARS Parlier
  Research Entomologist Leaf Scorch researcher
Light, Doug
Ludwig, Gabriele
Ryan, Fred USDA ARS Fresno
  Scientist plant physiology
Malkin, Richard
  Professor Emeritus Photosynthesis: energy transduction in biological membranes
Sisterson, Mark USDA-ARS San Joaquin Valley Agricultural Science Center
  Plant Pathology - Almond Leaf Scorch
Teuber, Suzanne UCD Medical School
Membership Totals
Number of Members81
ANR Members69
Info Only0
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