Butte County
University of California
Butte County

Walnut Notes

Issues Articles Type Date Added
12/20/2018 (1,610KB)
  • 2019 UCCE Winter Walnut Meetings
  • Newsletters are going online!
  • 2019 IPM Breakfast Meetings
  • Growing the Valley Podcast
  • Scale Pests, NOW, and Flatheaded Borers
  • Cost and Expense Considerations in a Lean Price Year
  • Tracking Winter Irrigation Needs
  • Updated Walnut Cost Study
PDF 1/2/19
08/28/2018 (2,726KB)
  • 2018 IPM Breakfast Meetings

  • 3rd Annual Harvest IPM Workshop

  • Newsletters are going online!

  • 2018 Advances in Walnut Production Short Course

  • 2019 UCCE Winter Walnut Meetings

  • Fall Orchard Management Considerations

  • Pruning with BOT Infections in Mind

  • Optimizing Your Orchard Spacing

  • Impacts and Recovery on Walnuts from 2017 Flooding
PDF 8/28/18
06/05/2018 (1,945KB)
  • 2018 IPM Breakfast Meetings
  • Walnut Orchard Management
  • Early Walnut Tree Training
  • Leaf symptoms of overwatering walnut trees
  • Early Walnut Tree Training: How to Handle Different Nursery Products and How to Use a Pressure Chamber for Irrigation Scheduling Hands-on Workshop
PDF 6/20/18
03/12/2018 (1,805KB)
  • 2018 IPM Breakfast Meetings 
  • Orchard Management Considerations 
  • A New Tool in the Fight Against Blight 
  • 2018 Winter and Early Season Irrigation 
  • 2017 Flood Damaged Trees - Research Results 
  • Tree and Vine Crop Herbicide Chart
PDF 3/26/18
04/04/2017 (2,020KB)
  • Walnut Blight Management 
  • Flooded Orchards: What To Do 
  • Monitoring Codling Moth In and Near Mating Disruption Orchards 
  • IPM Breakfast Meetings Announcement 
  • Managing Bot Canker & Blight: Research Updates 
  • Orchard Management Considerations: Budbreak to Early Summer 
  • Field Meeting Announcements
PDF 3/26/18
01/03/2017 (970KB)
  • NOW Update 
  • New: Monthly IPM Breakfast Meetings 
  • 2017 UCCE Walnut Meetings 
  • Agenda: Butte/Glenn County Almond & Walnut Day 
  • Counting Winter Chill
PDF 3/26/18
07/28/2016 (1,415KB)
  • Walnut Husk Fly Update 2016 
  • Tipping the Scales to Favor Walnut Quality 
  • Summary of WHF Efficacy Data 
  • Selecting the Right Clonal Rootstock for Managing Soil and Pest Problems 
  • In-Season Walnut Production Considerations
PDF 3/26/18
03/22/2016 (1,476KB)
  • When to Begin the Irrigation Season 
  • The Latest on Managing Bot Canker and Blight - 2015 Research Updates 
  • New Walnut Variety ‘Durham’ Released 
  • Orchard Management Considerations: Delayed Dormant through Early Summer 
  • Tree and Vine Crop Herbicide Chart
PDF 3/26/18
01/20/2016 (1,104KB)
  • Key to Navel Orangeworm Management - NOW is the Time 
  • Pruning Under the Threat of Bot 
  • New Walnut Cost Study 
  • Training Young Walnut Trees: Minimum Pruning vs. No Pruning Compared 
  • Upcoming UC Walnut Meetings
PDF 3/26/18
08/14/2015 (1,320KB)
  • Navel Orangeworm in Walnuts 
  • Using Ethephon for Earlier Harvest 
  • Preparing Young Walnut Trees for Winter 
  • Late Summer and Fall Orchard Management Considerations
PDF 3/26/18
03/16/2015 (2,050KB)
  • Advances in Walnut Production Course
  • Walnut Orchard IPM Activities
  • Walnut Blight Management
  • Preventing Walnut Scale and Botryosphaeria Canker and Blight
PDF 3/26/18
09/22/2014 (963KB)
  • New UC Walnut Budding, Grafting, and Planting Video Released
  • Fall Orchard Management Considerations 
  • Black Mushy Walnut Hulls - Possible Causes 
  • Orchard Removal and Site Preparation for Walnuts 
  • How to Avoid Freeze Damage in Young Walnut Trees
PDF 3/26/18
01/03/2015 (1,196KB)
  • Butte & Glenn County Walnut Day Meeting Agenda 
  • Walnut Orchards Planted in 2014 - What to do now? 
  • Walnut Year-Round IPM Plan and Winter Orchard Pest Management Activities 
  • Save the Date - Upcoming Walnut Meetings
PDF 3/26/18
07/01/2014 (948KB)
  • New IPM Advisor Introduction
  • Advisor Retirement – Thanks!
  • New Farm Advisor Introduction 
  • Scale Identification and Lifecycles in Walnut Orchards ?Walnut Husk Fly Trap and Low Volume Spray Study Update
  • Irrigation Management Tools for Developing Walnut Trees
PDF 3/26/18
04/08/2014 (514KB)
  • California Walnut Research: moving the industry forward
  • New Farm Advisor introduction
  • Understanding and managing Botryosphaeria and Phomopsis canker & blight in walnut
  • Watch for early insect activity
  • Perspective on trends in orchard spacing, pruning, and potential disease 
  • Springtime recovery from winter freeze damage
PDF 3/26/18
07/09/2013 (1,021KB)

In This Issue:    

                     Irrigation management tools for developing walnut trees

                     Walnut husk fly trap study

                      Ethephon use considerations in the Sacramento Valley


PDF 7/9/13
03/22/2013 (1,241KB)

In This Issue:

                        2013 Walnut Blight Management

                        Spacing Walnuts for Optimum Light Interception & Production

                        Guidelines for Handling Potted Walnut Clonal Rootstock Plants

                        New Walnut Variety "Solano" Released

                        Save The Date: Walnut Husk Fly Monitoring  
                                                & Control Field Meeting

PDF 3/22/13

In this Sacramento Valley Walnut News:
Guidelines for handling and planting bareroot walnut nursery trees
Orchard removal and site preparation for walnut planting
Diagnosisng and managing branch wilt disease
Management of first year walnut trees in fall and spring
Points to consider in the prevention of crown gall

DOCX 10/12/12
07/12/2012 (689KB)

In this Sacramento Valley Walnut News:
2012 walnut blight
New walnut cost study for the Sacramento Valley
Advisor retirement and new position proposals
Anthracnose, Botryosphaeria, and Phomopsis in walnut -- updates
Orchard management impacts on walnut quality

PDF 7/11/12
02/23/2012 (4,064KB)

In this Sacramento Valley Walnut News:
Walnut blight management
Training and pruning young walnut trees
tools for weed management decisions in orchard crops
Walnut Pruning Field Meeting- March 6th, Arbuckle
Mobil Irrigation Lab

PDF 2/23/12
  • Codling moth management
  • Orchard management impacts on quality 
  • 'Ivanhoe' early harvesting cultivar & 'Ivanhoe' local observations 
  • Botryosphaeria and Phomopsis cankers 
  • Walnut Husk Fly Field Meeting June 9th 
  • Walnut Dehydrator Workshop, June 28th
PDF 6/1/10
  • Walnut Research Reports are Available On-line 
  • New Cost Study on Hulling and Drying Walnuts and Dehydrator Workshop 
  • Comparing Retain® and Hold™ for Reducing PFA and Increasing Yield in ‘Serr’ Walnuts 
  • Managing Phytophthora in Walnuts
  • Winter Freeze Damage - Spring Recovery
  • Spring Frost? 
  • Walnut Blight Management Update - 2010 Growing Season 
  • Walnut Blight Control Experience over the Last 20 years
PDF 3/22/10
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