UC IPM Pest Management Guidelines: Walnut
UC ANR Publication 3471
Authored by University of California faculty, specialists, and farm advisors, produced and edited by UC Statewide IPM Program, University of California, Davis.
![[UC Peer Reviewed]](/assets_v5/images/uc-peer-reviewed.png)
Suggested Citation
Grant JA, Symmes EJ, Baldwin RA, Fichtner EJ, Roncoroni JA, Westerdahl BB, Adaskaveg JE, Bostock RM, Browne GT, Buchner RP, Coates WW, Elkins RB, Gubler WD, Hanson B, Hasey JK, Hembree KJ, Michailides TJ, Seybold SJ, Van Steenwyk RA, Westphal A. Revised continuously. UC IPM Pest Management Guidelines: Walnut. UC ANR Publication 3471. Davis, CA.
Crop Leadership Team
E.J. Symmes, UC IPM and UC Cooperative Extension Butte County (crop team leader)
J.P. Rijal, UC IPM and UC Cooperative Extension Stanislaus County (IPM facilitator)
R. DeBiase, UC IPM, Davis (coordinator)
R.A. Baldwin, Wildlife, Fish and Conservation Biology, UC Davis
E.J. Fichtner, UC Cooperative Extension Tulare County
J.A. Roncoroni (emeritus), UC IPM and UC Cooperative Extension Napa County
B.B. Westerdahl, Nematology, UC Davis
Diseases
J.E. Adaskaveg, Plant Pathology, UC Riverside
R.P. Buchner (emeritus), UC Cooperative Extension Tehama County
G.T. Browne, Plant Pathology, UC Davis
W.D. Gubler (emeritus), Plant Pathology, UC Davis
T.J. Michailides, Kearney Agricultural Research and Extension Center, Parlier
J.K. Hasey (emeritus), UC Cooperative Extension Sutter and Yuba Counties
E.J. Fichtner, UC Cooperative Extension Tulare County
S.J. Seybold, Entomology, UC Davis (thousand cankers disease)
R.M. Bostock, Plant Pathology, UC Davis (thousand cankers disease)
Acknowledgment for Contributions to Diseases
B.L. Teviotdale (emeritus), Kearney Agricultural Research and Extension Center, Parlier
Insects, Mites, and Other Invertebrates
J.A. Grant (emeritus), UC Cooperative Extension San Joaquin County
J.K. Hasey (emeritus), UC Cooperative Extension Sutter and Yuba Counties
W.W. Coates (emeritus), UC Cooperative Extension San Benito County
R.A. Van Steenwyk (emeritus), Environmental Science, Policy, and Management, UC Berkeley
E.J. Symmes, UC IPM and UC Cooperative Extension Butte County (IPM facilitator)
S.J. Seybold, Entomology, UC Davis (walnut twig beetle)
R.M. Bostock, Plant Pathology, UC Davis (walnut twig beetle)
Acknowledgment for Contributions to Insects, Mites, and Other Invertebrates
W.J. Bentley (emeritus), UC IPM and Kearney Agricultural Research and Extension Center, Parlier (Emeritus)
L.C. Hendricks (emeritus), UC Cooperative Extension Merced County (Emeritus)
W.H. Olson, UC Cooperative Extension Butte County (Emeritus)
C. Pickel (emeritus), UC IPM and UC Cooperative Extension Sutter and Yuba counties (Emeritus)
G.S. Sibbett (emeritus), UC Cooperative Extension Tulare County (Emeritus)
D. Light, USDA, Albany (Emeritus. codling moth)
Nematodes
B.B. Westerdahl, Nematology, UC Davis
A. Westphal, Kearney Agricultural Research and Extension Center, Parlier
J.K. Hasey (emeritus), UC Cooperative Extension Sutter and Yuba Counties
Acknowledgment for Contributions to Nematodes
U.C. Kodira, Nematology, UC Davis
M.V. McKenry (emeritus), Nematology, UC Riverside
Vertebrates
R.A. Baldwin, Wildlife, Fish and Conservation Biology, UC Davis
Weeds
J.A. Roncoroni (emeritus), UC IPM and UC Cooperative Extension Napa County
B. Hanson, Plant Sciences, UC Davis
K.J. Hembree, UC Cooperative Extension Fresno County
R.B. Elkins (emeritus), UC Cooperative Extension Lake County
J.K. Hasey (emeritus), UC Cooperative Extension Sutter and Yuba Counties
Acknowledgment for Contributions to Weeds
K.K. Anderson, UC Cooperative Extension Stanislaus County
C.L. Elmore (emeritus), Weed Science and Plant Sciences, UC Davis
J.A. Grant (emeritus), UC Cooperative Extension San Joaquin County
W.O. Reil (emeritus), UC Cooperative Extension Solano and Yolo counties
T.S. Prather, Department of Plant, Soil, and Entomological Sciences (PSES), University of Idaho
A. Shrestha, Plant Science, Fresno State
G.S. Sibbett (emeritus), UC Cooperative Extension Tulare County
J.J. Stapleton, UC IPM and Kearney Agricultural Research and Extension Center, Parlier
Acknowledgment for Contributions to Year-Round IPM Program
W.J. Bentley (emeritus), UC IPM and Kearney Agricultural Research and Extension Center, Parlier (Emeritus)
W.H. Krueger (emeritus), UC Cooperative Extension Glenn County
D. Light, USDA, Albany
M.V. McKenry (emeritus), Nematology, UC Riverside
C. Pickel (emeritus), UC IPM and UC Cooperative Extension Sutter and Yuba counties
A. Shrestha, Plant Science, Fresno State
Coordinator
R. DeBiase, UC IPM, Davis
C. McKerracher, UC IPM, Davis
Production
F.G. Rosa, UC IPM, Davis
This material is partially based on work supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, Crop Protection and Pest Management Competitive Grants Program.
These guidelines represent the best information currently available to the authors and are intended to help you make the best choices for an IPM program. Not all formulations or registered pesticides are mentioned. Always read the label and check with local authorities for the most up-to-date information regarding registration and restrictions on pesticide use. Check with your agricultural commissioner for the latest restricted entry intervals.