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Kari Arnold joined UCCE as an area orchard and vineyard systems advisor in Stanislaus County on Nov. 1, 2017.

Prior to joining UCCE, Arnold was a postdoctoral researcher in the Department of Plant Pathology at UC Davis, where she participated in a statewide extension and outreach program involving viruses in grapevines and the certification program, collaborated with county viticulture advisors and industry leaders to facilitate grower workgroups for regional management of grapevine viruses, and provided presentations at grower meetings.

As a graduate student researcher from 2011 to October 2016, Arnold participated in individual grower meetings and surveys, facilitated and collaborated with a grower workgroup for areawide disease management in Napa vineyards, and conducted statistical characterization of spatial and temporal patterns of insect-vectored plant viruses. From 2009 to 2011, Arnold also worked as a staff research associate and nursery technician for Foundation Plant Services at UC Davis, where she provided employee training; worked on team oriented projects; provided tours, conducted virus indexing, and collected and analyzed data.

Arnold completed an M.S. and a Ph.D. in plant pathology from UC Davis and a B.S. in horticulture from the University of Nebraska – Lincoln.

Walnut News & Fruit For Thought Newsletter

Issue Articles Type Date Added
COVID-19 Notification

Please see the attached link concerning our office and the COVID-19 outbreak.

PDF 3/25/20
IPM Breakfast Meeting Cancellation 3/18 & 4/1

Due to the threat of the corona virus that causes COVID-19, University of California employees have been ordered to temporarily cancel all face to face educational events, regardless of size.  In addition, President Trump has advised against meeting in groups of more than 10 people and avoiding restaurants.  Therefore Jhalendra, Kari and I will cancel our March 18 and April 1 Tree & Vine IPM breakfast meetings.  We will monitor the situation closely and will make a decision on future meetings as the situation unfolds. 

Best wishes,


Roger Duncan

Pomology Advisor and Director

UC Cooperative Extension, Stanislaus County





PDF 3/17/20
IPM Breakfast Meetings

2020 Tree and Vine IPM Update Breakfast Meetings

Roger Duncan, Kari Arnold, and Jhalendra Rijal will continue to host the IPM breakfast meetings. These free meetings are open to all interested fruit and nut growers, consultants, and pest control advisors for a casual discussion on current insect pest populations, disease problems, and methods of control. We are looking forward to seeing you there.

  • March 4, 2020 - Spring Pests & Diseases of Trees and Vines 
  • March 18, 2020 - Laws and Regulations 
  • April 1, 2020-TBD
  • April 15, 2020-TBD
  • May 6, 2020-TBD
  • May 20, 2020-TBD
  • June 3, 2020-TBD
  • June 17, 2020-TBD
PDF 2/25/20
Spray Application Pest Management Alliance Airblast Sprayer Calibration Training

We will be holding a training aimed at applicators, growers, and PCAs who work in vineyards-to be held on February 20, 2020, at Kautz Farms in Lodi.

The registration link is http://ucanr.edu/SprayAppLodi/ 

Please see attached link for more information. 

PDF 1/28/20
California Cherry Research Review

Wednesday, January 22, 2020
9:00 a.m. - 1:30 p.m.

San Joaquin County – Office of the Agricultural Commissioner
Evelyn Costa Assembly Room
2101 E. Earhart Avenue, #100, Stockton, California 95206
Sponsored by the University of California and California Cherry Board

9:00 Welcome
Scott Brown, Production Manager, Morada Produce
Tyler Rood, California Cherry Board
9:10 The investigation into dormancy breaking agents and the dynamic chill portions model in CA cherries via carbohydrates and solar radiation
Dr. Kari Arnold, UCCE Orchard and Vineyard Systems Advisor, Stanislaus County
9:30 Cherry buckskin disease review: x-disease phytoplasma
Dr. Mohamed Nouri, UCCE Orchard Systems Advisor, San Joaquin County
10:00 Measuring cherry evapotranspiration and deriving crop coefficient (Kc) values for use in irrigation scheduling
Dr. Kosana Suvocarev, Dept. of Land, Air & Water Resources, UC Davis
10:20 Engineered transgenic Drosophila suzukii for wild population suppression & eradication: production, performance assessment and effective wild releases Dr. Nikolay Kandul, Div. of Biology Sciences, UC San Diego
10:50 Break
11:10 Improved management of fungal canker diseases of sweet cherry
Investigating the cause of sudden decline of sweet cherry in California
Dr. Renaud Travadon, Dept. of Plant Pathology, UC Davis, Kearney Agricultural Research & Extension Center, Parlier, CA
12:00 Management and epidemiology of pre- and postharvest diseases of sweet cherry
Dr. James Adaskaveg, Dept. of Plant Pathology, UC Riverside
12:30 Lunch (Courtesy of California Cherry Board)
1:30 Adjourn

PDF 1/21/20