Glenn County
University of California
Glenn County

Orchard Facts

News, Updates and Articles On Orchard Crops In The Northern California Area.

Issue Articles Type Date Added
Morning Meet-Ups Announcement (457KB)

Morning Meet-Ups
Every other Thursday in May and June
(May 2, May 16, May 30, June 13, June 27)
7:30am – 9am

Berry Patch Restaurant
900 A Newville Rd, Orland, CA 95963

**No-Host Breakfast**

CCA credits will be offered if approved

PDF 4/26/19
Prune- Spring 2019 (1,871KB)

In this issue:

  • The Advantages of Tighter Spacing and Greater Light Interception in California Prune Orchards
  • Thinning Prunes
  • Prune Management Considerations: Spring - Summer
  • 2019 IPM Breakfast Meetings


PDF 4/25/19
Almond- April 2019 (3,709KB)

In this issue:

  • Hull Rot Management
  • Hull Split Timing and Sprayer Practices for Best Pest control Results
  • The Many Possible Causes of “Gummy Nuts” in Almonds
  • Pre- and Post- Herbicide Performance on Threespike Goosegrass in Tree Nut Orchards
  • Almond Management Considerations
  • 2019 IPM Breakfast Meeting


PDF 4/4/19
Walnut- April 2019 (765KB)

In this issue:

  • Walnut Blight Management 2019
  • Revisiting Your Codling Moth IPM Program in a Lean Crop Year
  • Pulling the trigger for the start of irrigation in the spring: Too much too soon for walnuts?
  • Orchard Management Considerations: Budbreak through Early Summer
  • Tree and Vine Crop Herbicide Chart
  • 2019 IPM Breakfast Meetings


PDF 3/29/19
2019 Almond Nutrient and Water Field Day (1,561KB)

Please check out the attached flyer for the 2019 Chico Almond Nutrient and Water Field Day.

Tuesday, March 26th, 2019

8:30 a.m. - 10:00 a.m.

Chico State University Farm - Pecan Orchard

311 Nicholas C Shouten Ln

Chico, CA.

(Directions attached to flyer.)

PDF 3/7/19
Prune- February 2019 (1,615KB)

In this issue:

  • Prune Day Agenda
  • Trends in World Prune Markets
  • Is this a Year to Skip Thinning?
  • Bloom Disease Treatments in Prune and Honey Bee Safety
  • Weed Management when Replanting Trees
  • Update on Heart Rot in Prunes
  • Orchard Considerations
  • 2019 Winter Prune Meetings


PDF 2/5/19
Almond- January 2019 (1,055KB)

In this issue:

  • North Valley Almond & Walnut Day Agenda
  • Wood Decay in Almonds
  • Protecting Honeybees at Bloom
  • Almond Bloom Diseases
  • Fungicide Efficacy and Timing Tables
  • Orchard Management Considerations
  • Early Season Irrigation


PDF 1/2/19
Walnut- January 2019 (1,454KB)

In this issue:

  • North Valley Almond & Walnut Day Agenda
  • Tracking Winter Irrigation Needs
  • Cost and Expense Considerations in a Lean Price Year
  • Scale Pests, Navel Orangeworm and Flatheaded Borers
  • 2019 IPM Breakfast Meetings
  • New Walnut Cost Study


PDF 1/2/19
October 2018 Glenn IPM Breakfast meeting (181KB)

Friday, October 19th, 2018 at 7:30 a.m. - 9:00 a.m.

Join your local team of UC Cooperative Extension Farm & IPM Advisors to discuss current pest management and production issues in orchard crops.

PDF 10/15/18
Prune- Fall 2018 (1,994KB)

In this issue:

  • Pros and Cons of Mechanical Pruning
  • Cytospora
  • Fall/Winter Management Considerations
  • Post– Harvest Almond and Walnut IPM Workshop Announcement


PDF 10/12/18
Orchard Facts- Walnut September 2018 (4,108KB)

In this Issue:

  • Pruning with Bot Infections in Mind
  • Optimizing your Orchard Spacing
  • Impacts and Recovery on Walnuts from 2017 Flooding
  • Fall Orchard Management Considerations
  • Meeting Announcements


PDF 8/21/18
Orchard Facts- Almond June 2018 (982KB)

In this issue:

  • June Hull Rot Reminder
  • Monterey and the Leafing Failure
  • Irrigation Management for Hull Rot Control
  • School is out, and the grades are coming in: July Leaf Analysis
  • Pre- & Post-Harvest Almond Orchard Management Considerations
  • IPM Breakfast Meeting Announcement


PDF 6/13/18
June 2018 IPM Breakfast Meeting (167KB)


June IPM Breakfast Meeting

Glenn County


Friday, June 15th, 2018, 7:30am – 9:00am


Join University of California Cooperative Extension (UCCE) Area IPM and Farm Advisors to discuss current pest management and production issues.


We will largely focus on orchards crops (but everything is on the table for discussion!). These meetings are open to all interested growers, consultants, PCAs/CCAs, and related industry. Planned topics for this meeting include (but not limited to!) updates on insect and disease activity and in-season management considerations.


Please contact Emily Symmes to request additional topics or bring your questions to the meeting!

 ** DPR and CCA hours approved (1.5 other)**


June meeting will be held at Berry Patch Restaurant (900 Newville Rd, Orland, CA)


Space is limited – please RSVP to Emily Symmes at (530) 538-7201

or by June 13th to let us know you plan to attend.

PDF 6/11/18
Orchard Facts- Walnut June 2018 (2,279KB)

In this issue:

  • Early Walnut Tree Training: How to Handle Different Nursery Products
  • Leaf Symptoms of Overwatering Walnut Trees
  • Walnut Orchard Management: June—August
  • Meeting Announcement: Early Walnut Tree Training & Use of Pressure Chamber
  • Walnut Short Course— First Announcement


PDF 6/7/18
Nickels Soil Lab Annual Field Day (311KB)


Tuesday, May 8, 2018, 8:30 am — 12:15pm

Marine Ave, Arbuckle, CA

0.75 hr PCA CE credits requested; 2 hours CCA CE credit requests

  • Overview of navel orangeworm management
  • Band canker management
  • Frost protection in almonds
  • Almond flower biology
  • Basic Bee Biology 101
  • Ceratocystis canker: diagnosis and management
  • Using real time physiological data to guide irrigation scheduling
  • What are we learning from orchard biomass (chip and mix) studies?
  • BBQ Tri-Tip Lunch by reservation

Click link inside for agenda, map, and lunch reservation form.

PDF 4/24/18
Orchard Facts- Walnut March 2018 (1,733KB)

In this issue:

  • A new Tool in the Fight Against Blight
  • 2018 Winter and Early Season Irrigation Considerations in Walnut
  • Tree and Vine Herbicide Chart
  • 2017 Flood Damaged Trees -Research Results and What to do this Spring
  • Orchard Management Considerations


PDF 3/13/18
Prune Notes - March 2018 (1,205KB)

In this issue:

  • Dry, Warm Winter Raises Questions about Irrigation
  • Thinning Prunes
  • Evaluating New Rootstocks: What’s the Latest?
  • Fungicide Efficacy Tables
  • New Hazard for Interplanted Orchards
  • Prune Bloom Orchard Management Considerations
  • Meeting Announcements


PDF 2/27/18
Orchard Facts- Almond Feb. 2018 (1,247KB)

In this issue:

  • How is Band Canker Infecting Young Trees?
  • Navel Orangeworm Considerations
  • Honeybees & Bloom Sprays
  • Missing the Target: Why you Should Irrigate Potted Trees Directly onto Potting Media
  • When is Peach Twig Borer a Concern?
  • Bloom Orchard Management Considerations
  • Meeting Announcements


PDF 2/1/18
2018 Butte-Glenn-Tehama Walnut and Almond Day (561KB)

New Meeting Announcements!

Butte-Glenn-Tehama Walnut and Almond Day
Wednesday, January 31st, 2018
Silver Dollar Fairgrounds, Chico
Walnuts: 8:30am – noon   Lunch: noon – 1pm   Almonds: 1:15 – 4:45pm

 Hosted by: Dani Lightle– UCCE Glenn Orchard Advisor &

Luke Milliron– UCCE Butte Orchard Advisor


Tehama County Walnut Meeting

February 2nd, 2018

Red Bluff Elks Lodge, 355 Gilmore Road

Red Bluff, CA 96080

Meeting Sponsors:  UCCE– Tehama Co., Tehama Co Ag Commissioners, Chuck Crain– Crain of California



PDF 1/5/18
November 2017 Post Harvest IPM Meeting Agenda (1,404KB)

Here is a quick announcement for you!

PDF 11/9/17
Orchard Facts- Walnut September 2017 (1,299KB)

Here is an updated version of the September Walnut Newsletter.

PDF 10/27/17
Orchard Facts- Almond October 2017 (1,157KB)

In this issue:

  • Update on Yellow Monterey Almond Trees
  • New Pesticide Labels Available to Help Control Pruning Wound Infections
  • Gophers Kill Trees
  • Bacterial Spot: A Dangerous Disease
  • Almond Orchard Management Checklist: Post-Harvest and Dormancy
  • Upcoming UCCE Almond Meetings


PDF 10/9/17
Orchard Facts- Prune July 2017 (1,473KB)
  • New Farm Advisor Introduction
  • Root Asphyxiation (Waterlogging)
  • Bacterial Canker in the Sacramento Valley
  • Advances in Cytospora Canker Management
  • July and August Prune Management Considerations


PDF 7/11/17
Orchard Facts- Almond June 2017 (1,753KB)

In this issue:

New Farm Advisor Introduction

· Varieties and Bacterial Blast During Bloom

· Approaches to Spider Mite Management in Almonds

· Navel Orangeworm Update

· Yellowing Trees on K86 Following a Wet Spring

· Pre- & Post– Harvest Management Considerations

PDF 6/13/17
Orchard Facts- Almond April 2017 (986KB)

In this issue:

  • Waterlogged Orchards
  • Correction: When to Apply the First Irrigation?
  • Nutrient Deficiencies in a Wet Spring
  • April Showers bring Yellowing Krymsk
  • Bloom Review: 2017
  • Almond Management Considerations
  • Nickels Soil Lab Annual Field Day Agenda

 Submitted by:

Dani Lightle

PDF 4/14/17
Orchard Facts- Walnut April 2017 (1,538KB)

In this issue:

  • 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 4/3/17
Orchard Facts- Prune March 2017 (1,389KB)

In this issue:

  • Crop Load Adjustment (Thinning Prunes)
  • Options for Bad Weather at Bloom
  • Fungicide Efficacy Tables
  • Bloom Orchard Management Considerations


PDF 2/17/17
Orchard Facts- Walnut January 2017 (928KB)
  • NOW Update
  • New: Monthly IPM Breakfast Meetings
  • 2017 UCCE Walnut Meetings
  • Agenda: Butte/Glenn County Almond & Walnut Day
  • Counting Winter Chill


PDF 1/30/17
Orchard Facts- Prune Oct 2016 (862KB)
  • Food for Thought When Planting a New Prune Orchard
  • Potted Tree Irrigation After Planting: Getting the First Year Right
  • Fall Prune Orchard Management Considerations Following a Light Crop
  • Preliminary Observations for New Prune Rootstocks
  • Prune Industry Summit 2017


PDF 10/14/16
Orchard Facts- Almond Oct. 2016 (884KB)

Here is the Pdf version of the Orchard Facts- Almond Newsletter for October 2016.

My apologies for the first issue.  It was not in Pdf format.

PDF 10/11/16
Orchard Facts- Almond Oct. 2016

In this issue:

  • Potted Tree Irrigation After Planting
  • Fall Zinc and Boron Review
  • Visit the Sac Valley Orchard Source Event Calendar
  • Leaf Rust of Almond
  • 2016 Almond Production Short Course
  • Pocket Gopher Management
  • Post-Harvest Considerations


PUB 10/11/16
Orchard Facts - Prune July 2016 (1,107KB) PDF 7/19/16
Orchard Facts - Sacramento Valley Walnut Newsletter July 2016 (1,374KB) PDF 6/30/16
Orchard Facts - June 2016 Almond Newsletter (1,365KB) PDF 6/21/16
Water Newsletter & Meeting Announcement - May 2016 (886KB) PDF 5/26/16
Orchard Facts May 2016 - Almond (1,008KB) PDF 5/9/16
Orchard Facts - Prune Newsletter - May 2016 (780KB) PDF 4/27/16
Spring 2016 Walnut Newsletter (1,431KB) PDF 3/23/16
Walnut Day Reminder JPG 2/23/16
Sacramento Valley Walnut Newsletter (1,050KB)
  • 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 1/21/16
Orchard Facts - Almond Newsletter - January 2016 (1,130KB)
  • Butte/Glenn Almond Institute Agenda
  • El Niño Rains and Pruning Don’t Mix
  • Frost Protection
  • Wet or Dry, Get Ready
  • Krymsk 86 in Cool, Wet Conditions
  • Pre-Bloom Almond Orchard Management considerations
  • Upcoming Almond Meetings


PDF 1/13/16
Orchard Facts - Prune Newsletter - November 2015 (837KB) PDF 11/3/15
Sacramento Valley Walnut Newsletter (1,227KB)
  • Navel Orangeworm in Walnuts


  • Using Ethephon for Earlier Harvest


  • Preparing Young Walnut Trees for Winter


  • Late Summer and Fall Orchard Management Considerations


PDF 8/20/15
Sacramento Valley Almond Newsletter (823KB)
  • Weak Areas in Orchards


  • 2015 Navel Orangeworm Update


  • Non-infectious Bud Failure Management


  • Almond Canopy Cankers


  • Why are Some Trees Yellow and not Growing?


  • Pre-Harvest Orchard Management Considerations


PDF 7/23/15
Sacramento Valley Prune Newsletter (646KB)


  • Predicting an Early ‘French’ Harvest


  • Blue Prune


  • Prune Cracking


  • Pre-Harvest Practices to Consider


PDF 7/23/15
Sacramento Valley Prune Newsletter (1,270KB)

Warm postbloom weather = early harvest?

How hot was it at bloom, 2015?

Drought strategies for California prune production

Crop load assessment and adjustment

N budgeting following the 4 Rs

Prune orchard management activities May through July

PDF 4/30/15
Orchard Facts - Almond Newsletter - April 2015 (1,320KB)



  • Navel Orangeworm in 2015
  • Almond Scab
  • Band Canker
  • N Budgeting Following the   Four Rs
  • In-season Almond Orchard Management Considerations
  • Nickels Field Day, May 6th



PDF 4/20/15
Orchard Facts - Walnut Newsletter - Spring 2015 (2,053KB)

Advances in Walnut

Production Course


Walnut Orchard

IPM Activities


Walnut Blight



Preventing Walnut Scale

and Botryosphaeria

Canker and Blight


PDF 3/16/15
Orchard Facts - Prune Newsletter - February 2015 (2,308KB)

South Sacramento Valley Prune Meeting - March 4

Prune Orchard Activities - February to May

Heat at Bloom Update

Honey Bee Safety During Prune Bloom

Pesticide Safety Train the Trainer Workshops

Fungicide Treatment Timing and Efficacy Tables

PDF 2/24/15
Sacramento Valley Almond Newsletter (1,243KB)
  • Butte & Glenn Counties Almond Institute agenda
  • Winter & bloom orchard management
  • Rootstock trial for boron tolerance
  • Honeybee safety during bloom
  • Bacterial spot of almond in CA
  • Winter sanitation for NOW control
  • California Almond Sustainability Program
  • Fungicide efficacy and timing
  • Save the date!


PDF 1/9/15
Sacramento Valley Walnut Newsletter (1,008KB)
  • 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 1/9/15
Orchard Spraying Field Meetings (254KB)

Orchard Spraying Field Meetings coming up!

PDF 10/23/14
Sacramento Valley Almond Newsletter (1,365KB) PDF 10/6/14
Sacramento Valley Prune Newsletter (1,986KB)

Fall Orchard Considerations October 2014

PDF 10/2/14
Sacramento Valley Walnut Newsletter (772KB)
  • New UC Walnut Budding, Grafting, and Planting Video Released
  • Black Mushy Walnut Hulls - Possible Causes
  • Orchard Removal and Site Preparation for Walnuts
  • How to Avoid Freeze Damage in Young Walnut Trees
  • Fall Orchard Management Considerations
  • Glenn County Residents Asked to Report Well Problems


PDF 9/18/14
Sacramento Valley Walnut Newsletter (1,164KB)
  • Scale Identification and Lifecycles in Walnut Orchards
  • Walnut Husk Fly Trap and Low Volume Spray Study Update
  • New IPM Advisor Introduction
  • New Farm Advisor Introduction
  • Irrigation Management Tools for Developing Walnut Trees
  • Advisor Retirement – Thanks!
  • Meeting Announcement: Nitrogen Management in Orchard Crops


PDF 7/1/14
Sacramento Valley Almond Newsletter (658KB)
  • Leaf Analysis and Salinity Monitoring 
  • New IPM Advisor Introduction 
  • New Farm Advisor Introduction 
  • Navel Orangeworm Management—2014 
  • Research Reveals the Core Components of Optimum Almond Production 
  • Advisor Retirement - Thanks! 
  • Meeting Announcement: Nitrogen Management in Orchard Crops



PDF 6/23/14
Sacramento Valley Prune Newsletter (797KB)
  • Chill Model Comparison - Why Two Models Judged Last Winter Very Differently 
  • Scouting for Spider Mites in Prunes 
  • New IPM Advisor Introduction 
  • New Farm Advisor Introduction 
  • Deficit Irrigation for French Prune 
  • Advisor Retirement - Thanks! 
  • Meeting Announcement: Nitrogen Management in Orchard Crops



PDF 6/19/14
Quickbooks® in Agriculture - June 19 (757KB)

Don’t Know Where to Start?

Is it the Right Small Business Accounting Software for Your Operation? Join us for an Introductory Interactive Overview of QuickBooks® Use for Agricultural Enterprises with Plenty of Time for Questions and Answers


PDF 6/4/14
Sacramento Valley Almond Newsletter (960KB)

New UCCE Farm Advisor Introduction

Foliar Nutrient Sprays: a Quick but Short Term Correction for Nutrient Deficiencies

Insect Activity, Spring 2014

Nitrogen Use Efficiency in Almonds

Irrigation Management

Nickels Soil Lab Annual Field Day



PDF 4/24/14
Sacramento Valley Prune Newsletter (872KB)

Irrigating French Prune During a Drought

New Advisor Introduction

How Hot was it at Bloom, 2014?

Efficient Nitrogen Management in Prune Production

Prune Aphids in Spring and Summer

Low Chill Hours?


PDF 4/21/14
Sacramento Valley Walnut Newsletter (1,020KB)

California Walnut Research

New Farm Advisor Introduction

Understanding and Managing Botryosphaeria and Phomopsis Canker and 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 4/9/14
Walnut Field Meeting (717KB)

Understanding & Managing Botryosphaeria and Phomopsis Canker and Blight in Walnut - April 2, 2014

Training Young Walnuts

Irrigation Scheduling and Drought Management Strategies Meeting - May 6



PDF 3/24/14
Sacramento Valley Prune Newsletter (1,883KB)

Prune Growing Meeting - March 7

Prune Fungicide Efficacy

March Orchard Activities

PDF 3/3/14
Orchard Facts January 2014 (16,267KB)

Almond Institute and Walnut Day - February 12

Tehama Walnut Day - February 7

Tehama Prune Day - February 21

Prune Notes

Almond & Walnut Notes


PDF 1/27/14
Sacramento Valley Almond Newsletter (1,122KB)

Navel Orangeworm Management - 2013

Almond Hull Rot - Cultural and Chemical Management

Alternaria Leaf Spot and Leaf Rust of Almond

Water Management for Almond - in-season, harvest and post-harvest

Pre-harvest Almond Orchard Nutrition

PDF 7/22/13
Sacramento Valley Walnut Newsletter (1,267KB)

Irrigation Management Tools for Developing Walnut Trees

Walnut Husk Fly Trap Study

Howard Nut Drop

Ethephon Use Considerations in the Sacramento Valley

PDF 7/22/13
Sacramento Valley Prune Newsletter (1,051KB)

Blue Prune Drop and Leaf Scorch

Earlier Harvest in 2013?

A Tough Year for Cankers


PDF 7/22/13
Sacramento Valley Almond Newsletter (1,094KB)

Almond Varieties

Crown Rot and Pruning Wound Cankers

New Video: Managing Almond Pests Using the Year-round IPM Program

Tying Young Trees

Navel Orangeworm Pressure?

PDF 5/1/13
Sacramento Valley Prune Newsletter (1,182KB)

Orchard Irrigation 2013

Tissue Sampling for Leaf Analysis


Efficient Nitrogen Management


How Hot Was it at Bloom?


PDF 5/1/13
Orchard Facts - Sacramento Valley Walnut Newsletter (2,852KB)

2013 Walnut Blight Management

Spacing Walnuts for Optimum Light

Guidelines for Handling Potted Walnut Clonal Rootstock Plants

New Walnut Variety 'Solano' Released

PDF 4/3/13
Winter Orchard Meetings (4,080KB)

Almond Institute/Walnut Day

Prune Day

Walnut Day




PDF 1/24/13
Irrigation and Nutrient Management Workshop for Orchard Crops (1,163KB)

December 5, 2012

Corning Veteran's Hall

1620 Solano Street, Corning

PDF 11/28/12
October 2012 (11,505KB)

Sacramento Valley Almond, Walnut and Prune Newsletter

PDF 10/25/12
Sacramento Valley Walnut Newsletter - July 2012 (2,831KB)

In This Issue

Retirement and New Positions

Orchard Management Impacts on Walnut Quality

Anthracnose in Walnut Update

2012 Walnut Blight

New Walnut Cost Study

PDF 8/1/12
Sacramento Valley Almond/Prune Newsletter - August 2012 (1,851KB)

In This Issue

Advisor Retirement/New Positions

Alternaria Leaf Spot and Leaf Rust of Almond

New Almond Cost Study for the Sacramento Valley

2012 Navel Orangeworm

Why are Some Individuals Trees Turning Yellow, are Weak, or Not Growing?

Coping with Rain at Harvest

Sizing Prunes at Harvest

Managing Prunes Through Harvest

Distinguishing Between Branch Dieback Disorders

New Prune Manual

PDF 8/1/12
Sacramento Valley Almond/Prune Newsletter (2,431KB)
  • Nickels Field Day
  • Nitrogen Use Efficiency in Almonds
  • Almond Pruning Wound Cankers
  • Almond Fungicide Timing and Efficacy Tables
  • When to Thin and Why
  • Crop Load Assessment and Adjustment
  • Get What You Pay for With Fertilizers
  • New Almond and Walnut
  • Cost of Production Studies


PDF 4/11/12
Sacramento Valley Prune Newsletter (999KB)
  • Heat at Bloom Update
  • It’s Your Money
  • Mobile Irrigation Lab
  • Fungicide Timing and Efficacy Tables
PDF 2/29/12
Sacramento Valley Walnut Newsletter - February (4,121KB)

Walnut Blight Management
Mobile Irrigation Lab
Training and Pruning Young Walnut Trees
Tools for Weed Management Decisions
Walnut Pruning Field Meeting

PDF 2/29/12
Sacrameno Valley Almond Newsletter - January 2012 (764KB)
  • Butte-Glenn Walnut Day & Almond Institute
  • South Sacramento Valley Winter Almond Meeting
  • Almond Board Sustainability Workshops
  • Guidelines for Planting Almonds
  • Pruning and Training Young Almond Trees
  • Winter Irrigation
  • Focus on Bees, Colony Stremgth and Health
  • Orchard Sanitation
PDF 1/23/12
Almond/Walnut Day Announcement (179KB)

Annual AlmondWalnut Day
February 1, 2012

PDF 1/12/12
Sacramento Valley Almond Issue - October 2011 (1,937KB)
  • Observations on Krymsk 86 Rootstock
  • A Short Review of Three Micronutrients: Zinc, Manganese and Iron
  • Review of Navel Orangeworm Control Research in Almond
  • Gopher Control
  • Alternaria Leaf Spot and Leaf Rust of Almond
PDF 10/26/11
Sacramento Valley Walnut/Prune Newsletter - September 2011 (853KB)


The Science (and Art) of Ethephon Use on Walnut
Additional Ethephon Use Considerations in the Sacramento Valley
Considerations When Replanting Individual Trees in a Walnut Orchard
How Traps are Used to Monitor Walnut Husk Fly
Walnut Huller and Dehydrator Food Safety (GMP) Checklist
Useful Websites Related to Walnut Production


New Prune Rootstock Research is Underway
Considerations When Removing Prune Orchards
Prune Orchard Fertility Review: Focus on the "Key 3"
Prune Research Reports Now Available on the Internet

PDF 9/22/11
Sacramento Valley Walnut Newsletter - July 2011 (835KB)

Howard Nut Drop

Codling Moth - The 2011 Season

Movento® (Spirotetramat) as a Nematicide

Update on New Walnut Varieties Forde, Gillet and Sexton

Preparing Young Walnut Trees for Winter

PDF 8/1/11
Sacramento Valley Almond Newsletter - July 2011 - Corrected (778KB)

Rotation Crops and Intercrops taht Do Not Increase Nematode Pests
New Changes in Aluminum Phosphide Labels
Herbicide Resistant Weed Survey
Using Leaf Tissue Analysis for Almond Nutrition
Understanding and Applying Information From a Soil Test: Salinity

PDF 7/27/11
Sacramento Valley Prune Newsletter - July 2011 (961KB)

Managing Fruit Brown Rot and Prune Rust
Blue Prune Drop and Leaf Scorch
Bloom Time Temperatures Compared to Fruit Set Set in 2011
Update on Spotted Winged Drosophila in Prunes
When Will Harvest Start in 2011?

PDF 7/19/11
Sacramento Valley Prune Newsletter - April 2011 (809KB)

Using Urea Efficiently
In-Season Potassium Fertilization Options for Prunes
A New Season - When to Begin Irrigation and How Much Water to Apply?
Crop Load Assessment and Adjustment
Crop Load Evaluation Field Meeting

PDF 4/27/11
Sacramento Valley Almond Newsletter - April 2011 (1,192KB)

Understanding and Applying Information From a Soil Test: Part 4

Bacterial Blast

Handling Late Planted Trees

Determining Sprayer Speed in the Field

Nitrogen Contribution From Irrigation Water

PDF 4/21/11
Sacramento Valley Walnut Newsletter - March 2011 (2,004KB)
  • Incidents of Walnut Scale are Increasing
  • Walnut Blight Management Using Bud Population Information
  • Early Season Ground Squirrel Management
  • Section 18 for Manzate Flowable and Pro-Stick Fungicide
  • Frost/Weather Forecasting Resources
  • Clonal Paradox Walnut Rootstocks and Pest Interactions Update
  • Ivanhoe Walnut Blight Update
PDF 3/17/11
Orchard Facts - February 2011 - Sacramento Valley Almond Newsletter (2,057KB)

Springtime Disease Control
Simple Jar Test – How to Evaluate Spray Compatibility
Waterlogged Orchards
Implementing Frost Protection





PDF 2/24/11
Sacramento Valley Prune Newsletter - February 2011 (844KB)

Maximizing Grower Profit in Tough Times


Sutter/Yuba Prune Day

Encouraging Prune Size and Quality

Frost Protection

High Temperatures at Bloom Reduces Fruit Set

PDF 2/18/11
Almond Walnut Day (201KB) PDF 1/24/11
Sacramento Valley Almond Newsletter - November 2010 (467KB)

Almond Board Conference

Hull Rot Review

Fall Nutrition Management

Understanding and Applying Information from a Soil Test

Why Dormant Spray Almonds?

Looking Back at 2010 Leaf Diseases

PDF 11/17/10
Sacramento Valley Prune Newsletter - October 2010 (754KB)

Scale Pests in Prune Orchards

Prune Out Cytospora Cankers to Reduce Disease

Fall Spray for Prune Aphid Management

Using High Oil Rate Before Bloom: Why Do It?

PDF 10/7/10
Sacramento Valley Walnut Newsletter - September 2010 (84KB)

Preparing Young Walnut Trees for Winter

Controlling Glyphosate-Resistant Weeds in Orchards with Rely

Using Ethephon to Accelerate and Enhance Harvest in 2010

Potassium Deficiency in Walnuts

Why Are Some Individual Young Walnut Trees Turning Yellow and Not Growing?

PDF 10/7/10
Sacramento Valley Prune Newsletter - July 2010 What Can You Do Now To Produce The Largest Prunes Possible? Field Sizing French Prune Managing Fruit Brown Rot in Prunes Spotted Winged Drosophila: New Damaging Pest in Prunes? PDF  
Sacramento Valley Almond Newsletter - July Almond Tree Blow-Over Problems “Biofix” for Almond Worm Pests Delivering a Clean Crop Verticillium Wilt in Almonds Understanding and Applying Information from a Soil Test - Part 2 PDF  
Sacramento Valley Walnut Newsletter - June 2010 Walnut Husk Fly Meeting Orchard Management Impacts on Walnut Quality Codling Moth Management New Early Harvesting Cultivar “Ivanhoe” Local Observations Botryosphaeria and Phomopsis Cankers of Walnuts 2010 Walnut Dehydrator Workshops PDF  
Sacramento Valley Prune Newsletter - April 2010 Prune Crop Load Assessment Eriophyid Mites Can Damage the Growth of Young Prune Trees In-season Prune Aphid Control July - Time for Prune Leaf Analysis Prune Rust Management Plan PDF  
Sacramento Valley Almond Newsletter Nickels Field Day Biofix for Oriental Fruit Moth, Peach Twig Borer, and Navel Orangeworm Commercial Almond Nutrition Program at Nickels Soils Lab Pacific Spider Mite Control at Hull Split in Almonds A Comparison of Several Methods for Controlling Pocket Gophers Understanding and Applying Information From A Soil Test PDF  
Sacramento Valley Walnut Newsletter Managing Phytophthora in Walnuts Comparing Retain® and Hold™ for Reducing PFA and Increasing Yield in ‘Serr’ Walnuts Winter Freeze Damage - Spring Recovery Spring Frost? Walnut Blight Management Update Walnut Blight Control Experience Over 20 Years Walnut Research Reports are Available On-line PDF  
Sacramento Valley Prune Newsletter Bacterial Canker & Blast in Prunes Heat at Bloom Prune Out Cytospora Cankers Prunes Need Honey Bees Bloom Brown Rot Management Prune Day Agenda PDF  
Almond/Walnut Day Flyer Details of the Upcoming Almond/Walnut Day PDF  
Home Orchard Pruning Workshop January 16, 2010 PDF  
October 2009 Hand and Mechanical Pruning Comparisons for French Prunes Zinc as an Orchard Management Tool Late Fall, a Time For Potassium Soil Applications World Prune Situation Sutter/Yuba Ag Spray Field Meeting PDF  
July 2009 Walnut Newsletter Fast Facts about Ethephon Use on Walnuts Continue Watching for Aphid and Spider Mite Infestations Crown Gall Treatment Best Management of Replant Alternative Fumigants Managing Codling Moth in Walnuts Using Pheromone Mating Disruption Field Day PDF  
Sacramento Valley Prune Newsletter - July 2009 What Can Ypu Do Now to Produce the Largest Prunes Possible? Harvest Timing for Sutter Fruit Brown Rot Management for Prunes Gopher Control - Better Late Than Never! Wrapper Burn PDF  
May 2009 Walnut Newsletter Soil Testing and Analysis: What to Expect in the Report Kaolin Particle Film Application for Walnut “Good Neighbor Program” Compatibility between Codling Moth Control Methods Walnut Scale PDF  
April 2009 Nickels Field Day Announcement PDF  
April 2009 Steps for Producing Large Prunes Irrigation with Reduced Water Supplies Prune Aphids in Spring/Summer Making Money Growing Prunes in 2009 Temperatures 30 Days After Bloom May Influence Fruit Size PDF  
Orchard Facts - February 2009 Sutter/Yuba Prune Day Announcement Walnut Dehydrator Workshops PDF  
Orchard Facts - February 2009 Winter Irrigation for Sacramento Valley Prunes Hand and Mechanical Pruning Comparisons for French Prunes What to Do If It's Hot During Prune Bloom Brown Rot Blossom and Twig Blight and Preventing Fungicide Resistance Oil Burn in Prunes PDF  
Walnut Day & Almond Institute Meeting Notice for Upcoming Walnut Day and Almond Institute PDF  
December 2008 Managing Walnuts for Cold Temperatures Winter Irrigation During Drought Guidelines for Planting Walnuts Pruning Tips for One & Two Year Old Trees Manex - The Rest of the Story 2009 Walnut Grower Meeting Schedule Newsletters Available Electronically PDF  
October 2008 Reducing Blow-Over Risk in Prune Manipulating Prune Bloom to Manage Risk of Heat at Bloom Maintaining Adequate Potassium Nutrition Pre-bloom Aphid Management Effective Timings and Materials for Prune Aphid Control PDF  
Orchard Facts - August 2008 Sacramento Valley Walnut Newsletter Cover Crop Seeding Demonstration Managing Walnut Harvest for Quality Site Preparation for Walnut Planting Fumigation Guidelines Planting a Successful Annual Reseeding Cover Crop Why Are Some Individual Young Walnut Trees Turning Yellow and Not Growing? PDF  
Orchard Facts - July 2008 Field Sizing French Prune Sutter Harvest Parameters Estimation of Harvest Date in the Sac. Valley Managing Fruit Brown Rot in Prunes Blue Prune Drop and Leaf Scorch PDF  
June 2008 - Walnut Codling Moth Pheromone Disruption Meeting Codling Moth Management Walnut Husk Fly Be Watching for Spider Mites or Aphids July - Time for Leaf Analysis Walnut Grower Referendum Newsletters Available Electronically PDF  
April 2008 Nickels Field Day Making Money Growing Prunes in 2008 Crop Management for Dried Plums Using Spring Weather Data to Predict Harvest Date for "Improved French" Prune Spring Irrigation PDF  
March 2008 - Walnut New Walnut Rootstocks and Pest Interactions Walnut Blight Control Spring Fertilization for Walnuts Managing Pistillate Flower Abortion in Walnut with ReTain Guidelines for Care of Young Walnut Trees Newsletters Available Electronically PDF  
March 2008 Sacramento Valley Prune Newsletter What To Do If It's Hot At Bloom - 2008 Brown Rot Blossom and Twig Blight Brown Rot Fungicide Resistance Management Considerations for In-Season Nutrition of Prunes New Dried Plum/Prune Varieties Available for Planting PDF  
February 2008 Yuba/Sutter Prune Day PDF  
September 2007 Nematode Problems in Prune Production Pruning and Training Prune Trees Fall Spray Controls Prune Aphid the Next Season – Fall, 2007 PDF  
Orchard Facts - July 2007 Irrigation Management - Pre/Post Harvest Prunes Need Honey Bees Cytospora Management Prune Harvest Timing PDF  
Orchard Facts May 2007 Prune Crop Control Early to Mid Season Irrigation Considerations Related to Fruit Quality World Prune Outlook Spray Drift Management Using Spring Weather Data to Predict Harvest Date for "Improved French" Prune PDF  
Orchard Facts April 2007 Nickels Lunch Reservation Form PDF  
Orchard Facts Nickels Field Day PDF  
Orchard Facts March 2007 Checking Your Annual Report Card PDF  
Orchard Facts Statewide Prune Day PDF  
Orchard Facts Statewide Pistachio Day PDF  
Orchard Facts Almond/Walnut Day PDF  
September 2006 Prune Aphids: Life Cycles and Over Wintering Biology Fall Spray Controls Prune Aphid the Next Season PDF  
July 2006 Prune Harvest Timing Glyphosate Resistant Ryegrass in California and Resistance Management Considerations Blue Prune Drop and Leaf Scorch Preharvest Pest Management Irrigation Management Pre and Post Harvest PDF  
May 2006 Prune Orchard Irrigation Summer Nutrition/Leaf Sampling Web-spinning Spider Mites Summer Diseases: Rust and Fruit Brown Rot PDF  
May 2006 Nickels Field Day Announcement PDF  
Walnut Day & Almond Institute 2006 PDF  
October 2005 PDF  
September 2005 PDF  
April 2005 Nickels Field Day PDF  
February 2005 UCCE Statewide Prune Day Frost Control Suggestions Planting Deciduous Trees Fungicide Treatment for Bloom and Leaf Disease in Almonds and Prunes - Material Efficacy and Timing PDF  
January 2005 Walnut Day/Almond Institute PDF  
May 2004 Nickels Field Day IPFP Field Day Risk Management Seminars Prune Handbook Available Crop ET Data PDF  
February 2004 UCCE Statewide Prune Day PDF  
January 2004 Butte/Glenn Almond/Walnut Day Off Type Chandlers Almond Rejects - 2003 in Review Almond Orchard Sanitation Dormant Season Pest Management Planning the Future of Cooperative Extension New Almond and IPM Manual PDF  
May 2003 Prune Pest and Orchard Management Short Course PDF  
May 2003 Almond Pest Management Alliance Spring Field Meeting PDF  
April 2003 Nickels Estate Field Day, Water Budget Irrigation Scheduling, Newsletters Available Electronically, Weather and Evapotranspiration Data Available PDF  
February 2003 Sutter/Yuba Dried Plum Day Advances in Codling Moth Management for Walnuts, Apples, Pears PDF  
May 2002 Almond Pest Mgt. Alliance Meeting PDF  
April 2002 25th Annual Nickels Field Day Registration Sheet PDF  
April 2002 Glenn County Surface Water Stewardship Workshop PDF  
February 2002 42nd Biennial Statewide Dried Plum Day PDF  
January 2002 Edition 2 Walnut Day & Almond Institute Program and Registration Form PDF  
January 2002 Butte/Glenn Almond/Walnut Day Controlling Prune Aphid IPM for Almonds PDF  
November 2001 Orchard Dormant Spray Meeting PDF  
April 2000 CIMIS Weather Data IPM Update Water Budget Irrigation Scheduling PDF  
July 1999 Blue Prune Drop and Leaf Scorch Union Mild Etch of Almond Prune Harvest Timing PDF  
October 1998 Precautions for Using Potassium Chloride Branch Wilt of Walnuts PDF  
July 1998 Irrigating Young Trees Leaf Analysis IPM Update PDF  
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