Butte County
University of California
Butte County

Prune Notes

Issue Articles  
03/06/2020
  • Orchard Considerations for Bloom and Beyond
  • Young Orchard Weed Management
  • New EPA Paraquat Restrictions
  • Navigating Irrigation Technology
  • Prune Fungicide Efficacy Tables
3/6/20 Download
(1,236KB PDF)
10/03/2019
  • Newsletters are going online!
  • Post-Harvest Almond & Walnut IPM Workshop
  • 2019 IPM Breakfast Meetings
  • Fall & Winter Prune Orchard Management Considerations
  • Long Pruning for Greater Early Yields
  • Cytospora: A year-round fight
  • Increase Your Return on Investment with Post-Harvest Weed Scouting
10/3/19 Download
(1,581KB PDF)
07/31/2019
  • Butte County Newsletters Going Online!
  • IPM Breakfast Meetings
  • Pre-Harvest & Harvest Prune Orchard Considerations
  • 2019 Canker Review
  • Delivering the largest fruit possible this year.
7/31/19 Download
(1,952KB PDF)
04/25/2019
  • Newsletters are going online!
  • 2019 IPM Breakfast Meetings
  • Prune Management Considerations: Spring -- Summer
  • The Advantages of Tighter Spacing and Greater Light Interception in California Prune Orchards
  • Thinning Prunes
  • Updated cost of producing prunes now available
4/25/19 Download
(1,579KB PDF)
01/29/2019
  • Newsletters are going online!
  • 2019 IPM Breakfast Meetings
  • N. Sacramento Valley Prune Day (Feb 22nd)
  • Orchard Considerations
  • Bloom Disease Treatments and Honey Bee Safety
  • Update on Heart Rot in Prunes
  • Is This a Year to Skip Thinning?
  • Weed Management Considerations When Replanting Trees
  • Fungicide Efficacy and Timing Tables for Prune
  • Trends in World Prune Markets
1/29/19 Download
(1,688KB PDF)
10/18/2018
  • Butte County Newsletters are going online!
  • 3rd Annual Post-Harvest IPM Workshop
  • Fall & Winter Prune Orchard Management Considerations
  • Cytospora Post-Harvest: Cut it out! Protect fresh cuts!
  • Pros and Cons of Mechanical Pruning
12/18/18 Download
(1,386KB PDF)
06/19/2018
  • Growing the Valley 
  • Pre-Harvest & Harvest Prune Orchard Considerations 
  • Managing canker diseases in prune orchards 
  • Prune Harvest Timing 
  • July Leaf Sampling
8/28/18 Download
(980KB PDF)
02/20/2018
  • South Sacramento Valley Prune Meeting
  • Prune Bloom Orchard Management Considerations 
  • Dry, Warm, Winter Raises Questions about Irrigation 
  • Thinning Prunes 
  • Evaluating New Rootstocks: What’s the Latest? 
  • New Hazard for Interplanted Orchards 
  • Fungicide Efficacy
3/26/18 Download
(1,878KB PDF)
10/02/2017
  • Advances in Prune Production
  • Fall Prune orchard management considerations following a heavy crop
  • Aphid Management Review
  • Upcoming IPM Breakfasts
  • New Farm Advisor Introduction
6/20/18 Download
(861KB PDF)
05/27/2017
  • Techniques to Time First Irrigation Dates for Prune 
  • Thinning Prunes 
  • Prune Orchard Nutrition: Thoughts for 2017 
  • Why are Some Prune Trees Yellow in the Spring? The Bicarbonate Blues. 
  • Prune Management Considerations: Late Spring through Summer
3/26/18 Download
(848KB PDF)
03/17/2017
  • Crop Load Adjustment (Thinning Prunes) 
  • Options for Bad Weather at Bloom 
  • Fungicide Efficacy Tables 
  • Bloom Orchard Management Considerations
3/26/18 Download
(1,480KB PDF)
10/17/2016
  • 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
3/26/18 Download
(961KB PDF)
05/25/2016
  • Prune Bloom, 2016 
  • Weekly Soil Moisture Loss Reports to Assist With Water Management 
  • Pocket Gopher Management: Don’t Wait Too Long! 
  • Prune Orchard Management Considerations – Fruit Development to Harvest
3/26/18 Download
(867KB PDF)
02/19/2016
  • 2015 Field Evaluation of Prune Rootstocks 
  • Fungicide Efficacy Tables 
  • Nitrogen Management for Prunes 
  • Prune Bloom Orchard Management Considerations
3/26/18 Download
(1,918KB PDF)
11/02/2015
  • Rain and pruning don’t mix 
  • Weed management in prunes 
  • Gear Up, Throttle Down for pest control and cost savings 
  • A good year for a fall spray in prunes? 
  • Fall orchard management considerations
3/26/18 Download
(900KB PDF)
07/21/2015
  • Predicting an Early ‘French’ Harvest 
  • Blue Prune 
  • Prune Cracking 
  • Pre-Harvest Practices to Consider
3/26/18 Download
(713KB PDF)
04/22/2015
  • 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
3/26/18 Download
(1,171KB PDF)
02/23/2015
  • South Sac Valley Prune Meeting 
  • Prune Orchard Activities February to May 
  • Heat at Bloom Update ? Honey Bee Safety During Prune Bloom 
  • Pesticide Safety Train the Trainer Workshops, March 12th in Davis 
  • Fungicide Treatment Timing and Efficacy Tables
3/26/18 Download
(2,337KB PDF)
10/01/2014
  • Fall Orchard Considerations 
  • Irrigation System Maintenance 
  • Cytospora Cankers can Destroy an Orchard 
  • Fall Weed Management Considerations in Prune Orchards 
  • Potassium Nutrition: Maintaining Optimum Levels by Replacing What You’ve Lost
  • Save the Date
3/26/18 Download
(1,987KB PDF)
06/18/2014
  • New IPM Advisor Introduction 
  • New Farm Advisor Introduction 
  •  Advisor Retirement – Thanks! 
  • Scouting for Spider Mites in Prunes 
  • Deficit Irrigation for French Prune 
  • Chill model comparison – Why two models judged last winter very differently
  • Nitrogen Management in Orchard Crops -- Red Bluff Meeting July 24th
3/26/18 Download
(549KB PDF)
04/16/2014
  • Prune aphids in Spring & Summer 
  • Irrigating French prune during a drought 
  • Efficient nitrogen management in prune production 
  • Low chill winter? 
  • How hot was it at bloom, 2014?
3/26/18 Download
(716KB PDF)
07/03/2013
  • Blue prune drop and leaf scorch
  • Earlier harvest in 2013?
  • 2013:  A tough year for cankers

                  

9/5/13 Download
(758KB PDF)
04/08/2013
  • Orchard Irrigation 2013
  • Prune Tissue Sampling for Leaf Analysis
  • How hot was it at bloom, 2013
  • Efficient Nitrogen Management in Prune Production

                    

9/5/13 Download
(624KB PDF)
01/31/2013
  • Heat at Bloom Update
  • Nitrogen Management for French Prune
  • Brown Rot Blossom/ Twig Blight & Preventing Fungicide Resistance
  • New 2012 Prune Cost Study for the Sacramento Valley
  • Red Bluff Prune Day Feb 8th --- Yuba City Prune meeting Feb. 27th
2/1/13 Download
(1,159KB PDF)
10/11/2012
  • Prune orchard nutrition
  • Fall spray for prune aphid management
  • Prune out Cytospora cankers to reduce disease
  • Two different spots on prune leaves
10/16/12 Download
(873KB DOC)
08/13/2012
  • Managing prunes through harvest
  • Sizing prunes at harvest
  • Distinguishing between branch dieback disorders
  • New Prune Production Manual Available
8/16/12 Download
(662KB PDF)
03/15/2012
  • Heat at bloom update
  • It's your money
  • Mobile Irrigation Lab Service
  • Fungicide Timing and Efficacy Tables
3/15/12 Download
(557KB PDF)
07/20/11
  • Managing fruit brown rot and prune rust.
  • Blue prune drop and leaf scorch.
  • Bloom time temperatures compared to fruit set in 2011.
  • Update on Spotted Winged Drosophila in prunes.
  • When will harvest start in 2011?
7/20/11 Download
(3,382KB PDF)
10/4/2010
  • Prune out Cytospora cankers to reduce disease
  • Fall spray for prune aphid management
  • Scale pests in prune orchards and keeping a balance of natural enemies
    to control them
  • Using a high oil rate before bloom: Why do it?
10/4/10 Download
(1,006KB PDF)
07/30/2010
  • 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?
7/30/10 Download
(PDF)
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