Disease Management for California Almond Production
California almonds are susceptible to many diseases, which can reduce crop yield and quality in both current and subsequent years. They also can weaken and, occasionally, kill trees. Almond diseases are caused by a wide variety of microorganisms including fungi, bacteria, and viruses. They also can result from certain environmental stresses or genetic disorders. Some occur only at particular times of the year; others remain in the tree and exhibit yearlong symptoms. Disease infections may be more or less severe depending on age of the tree, variety, and environmental conditions such as rainfall, temperature, humidity, soil type, and soil moisture content. In order to fully understand the impact of disease organisms and environmental conditions on almond trees, it's important to understand the tree's seasonal cycle, growth processes, and crop development. The purpose of this course is to provide an update on current diseases that occur in California almonds--everything from branch and root diseases to vascular disorders--and the latest disease management practices that can protect valuable orchards and crops.
- Lectures 9
- Questions 40
- Duration 1.5 h (approx)
This course is accredited by:
- California Department of Pesticide Regulation (1.5 hours "Other")
- Certified Crop Adviser (CCA) Accredited in U.S. and Canada (1.5 hours "IPM")
It is accredited for licensing categories: PCAs, Qualified Applicators, Private Applicators, Aerial Applicators, and County Permit Holders.
Thank you to J.E. Adaskaveg, Ph.D., Professor, Department of Plant Pathology, University of California, Riverside; Brent Holtz, Ph.D., former University of California Pomology Farm Advisor Madera County who is now UCCE county director and pomology farm advisor in San Joaquin County; G. T. Browne, Ph.D., USDA-ARS, Department of Plant Pathology, University of Calif. Davis; Themis J. Michailides, Ph.D., Department of Plant Pathology, University of California, Davis and Kearney Agricultural Research and Extension Center, Parlier, for research leading to the development of this course; and Bob Curtis, Associate Director of Agricultural Affairs, The Almond Board of California.
Almond disease photos are credited to University of California Integrated Pest Management.
Information for this course was also developed from the following sources:
- Integrated Pest Management for Almonds, Second Edition, published by University of California Agriculture and Natural Resources, Publication 3308. 2002.
- Compendium of Nut Crop Diseases in Temperate Zones, published by The American Phytopathological Society. 2002.
- Proceedings of the Annual Almond Industry Conferences, published by the Almond Board of California.
- Years of Discovery, a Compendium of Production and Environmental Research Projects, 1972-2003, published by the Almond Board of California.
Helpful links to additional information:
Order the UC IPM manual Integrated Pest Management for Almondsfrom: http://www.ipm.ucdavis.edu/IPMPROJECT/ADS/manual_almonds.html
A  list of FRAC fungicide groupings and their codes is located at: http://www.frac.info/what-s-new/2014/01/13/the-201...
Charts containing almond diseases, effective fungicides, FRAC codes and treatment timings are located at: http://www.ipm.ucdavis.edu/PMG/r3902111.html#TREAT...