Prunes
Bloom Management
- Changing Bloom Timing with Dormant Oil
- Heat at Bloom
- Advancing Prune Bloom: What we know so far
- GDH30 for 2025: where we stand and what it means
- Technology Spotlight: Cropload Estimation in Prunes
- Prune Fruit Bloom Report, 2025
- Bloom weather and prune fruit set: what we know so far
- Weather after 30 days after bloom helps plan thinning and harvest.
- The most important task of the year.
- Variable Bloom Weather Leads to Variable 2020 Prune Crop
- Prune Bloom Review, 2020
- Bad Bloom Weather Options
- Frost Protection
Diseases
- Canker Management After Pruning/Hedging: Spray Now or Pay Later.
- Prune Tree Killers – Key Resources for Growers and PCAs
- Cytospora Prevention in Late Winter & Early Spring
- 2025 Prune Fungicide Efficacy Tables
- Rootstock options for your next prune orchard (2024)
- Phellinus wood rot, or “Why do my trees blow up at harvest?”
- Three Steps to Combat Cytospora Canker
- Prune Brownline Alert
- Cytospora: A Prune Grower’s Archnemesis
- Five Practices to Help Prevent Bacterial Canker
- Pre-harvest Management of Brown Rot
- Bloom Disease Treatments and Honey Bee Safety
- Update on Heart Rot in Prunes
- Cytospora Cankers
- Brown Rot Blossom and Twig Blight
- Interplanted Orchard Hazards
- Why was rust an issue in 2016?
- Bacterial Canker and Blast
- Fruit Brown Rot
- Pruners Pocket Guide for Cutting out Cytospora
- Prune Rust Management Plan
Economics
- Thinning or Not? Weigh the Benefits Against the Costs Before Deciding “Not” This Season
- Some factors to consider when evaluating a new crop enterprise for your farm
- Assessing the Needs of Agricultural Producers in Butte, Glenn, and Tehama Counties
- Making money at harvest
- Find Small Improvements: The 5% Rule
Horticulture
- Winter Chill
- Optimizing Potassium Programs in Prune Orchards: Timing and Crop Load
- North Sac Valley Fruit Set and GDH30 Report
- South Sac Valley Fruit Set and GDH30 Report
- New UC Davis Prune Varieties Prove Promising 2025
- Prune Tree Killers – Key Resources for Growers and PCAs
- Getting the best grower returns at harvest
- Twelve ways to ruin a prune orchard.
- GDH30 for 2025: where we stand and what it means
- Technology Spotlight: Cropload Estimation in Prunes
- Gophers, Ground Squirrels, and Voles… Oh My!
- Rootstock options for your next prune orchard (2024)
- Checking Cropload and Shaker Thinning Prunes
- Roller Crimping – A Cover Crop Termination Option
- What are you doing for your orchard’s financial longevity?
- The Big Three in Prunes
- New UC Davis Prune Varieties Prove Promising
- Getting the best grower returns at harvest
- Replanting Prunes Back into Prunes
- Box Hedging May Decrease Sunburn in Prunes
- Mechanical Pruning of Prune Trees Update (2021)
- Mechanical Pruning Trial in ‘French’ Prune – Through Year Four
- Long Pruning for Greater Early Yields with Video
- Prune Orchard Investments in a Better Market Year
- Fruit set, 2021. What happened?
- Whole Orchard Recycling and Anaerobic Soil Disinfestation
- Trends in World Prune Markets - and What They Mean for California Grower Practices
- Online Tools for Orchard Establishment and Management
- Krymsk 86 rootstock: Superb anchorage in gale-force winds
- What new research into carbohydrates is teaching us about California orchards
- Update on Rootstocks for Prune Production - 2019
- Observations from the Prune Rootstock Trial - 2017
- Tighter Spacing and Greater Light Interception in Prunes
- Prune Thinning Calculator
- Prune Harvest Timing
- July Leaf Sampling: A Critical Task in Prune Production
- Blue Prune Drop
- Thinning Prunes
- Interplanted Orchard Hazards
- Food for thought when planting a new prune orchard
- Prune Orchard Nutrition - Springtime Considerations
- Potassium Nutrition - Maintaining Optimal Levels
- Prune Rootstock Trial Performance - 2015
- Options for Gopher Management
- Interpreting Soil Test Results
- Pruning Prunes - Hand vs. Mechanical Pruning (2016)
- When to Harvest
Insects & Mites
- Aphids - Spring & Summer Management
- Aphids – Fall & Winter Preventative Management
- Eriophyid Mites
- Managing webspinning spider mites in prunes
- Managing aphids in prune orchards
- Activator Spray Adjuvant Selection
- Prune Aphid Management
- Protect Bees from Pesticides using Bee Precaution Ratings from UC IPM
- Scale Pests
- Honey Bee Safety During Bloom
Irrigation
- Irrigating During a Drought - Scenarios
- Irrigating Using ETc
- Irrigation System Maintenance
- Irrigation: When to Start and How Much to Apply
- Principles of Irrigating During a Drought
- New Stem Water Potential Calculator Available Online
- Determining When to Start Irrigation in Prune
- Prune Orchard Pre- and Post-Harvest Irrigation Management (2025)
- Pre- and Post-Harvest Irrigation Management in Prune
- Late-season Irrigation Management in Prune
- For a Healthy Orchard Next Spring, Follow Through on Late Season Irrigation in Your Prune Orchard
- Irrigating with lower quality water? What to consider first.
- Navigating Irrigation Technology Overload
- Missing the Target: Why you Should Irrigate Potted Trees Directly onto Potting Media
- Top Five Questions: Evaluating a Water Supply for Suitability to Irrigate Nut Crops
- Irrigation Season Considerations
- Using a Pressure Chamber is Worthwhile
- Thinking About Irrigating This Winter?
- Potted Tree Irrigation after Planting: Getting the First Year Right
- Techniques to Time First Irrigation Dates for Prune
- Northern California Cropping and Irrigation Patterns (Part 1)
- Soil Moisture Sensor Selection is Confusing
- Zone Irrigation, Part 2 - Designing a System
- Zone Irrigation, Part 1 - Zone Irrigation Concepts
- Why are some prune trees yellow in the spring? The Bicarbonate Blues.
- Yellow Prune Leaves in June?
- When Should You Apply the First Irrigation of the Season?
- Northern California Cropping and Irrigation Patterns (Part 2)
Weed Control
- Management of Johnsongrass in Orchards
- Gophers, Ground Squirrels, and Voles… Oh My!
- Optimizing preemergent herbicide applications
- 2025 Herbicide Registration on California Tree and Vine Crops
- New EPA Paraquat Restrictions
- Are you choosing the right spray for the right weeds?
- Weed Management Considerations When Replanting Trees in an Established Orchard
- Young Orchard Weed Management
- Increase Your Return on Investment with Post-Harvest Weed Scouting
- Weed Management Tools
- Fall Weed Management
Year-Round Management
- March Prune Orchard Management Considerations
- May Prune Orchard Management Considerations
- April Prune Orchard Management Considerations
- The Big Three in Prunes
- Find Small Improvements: The 5% Rule
- Potassium Management Options in Prunes
- September Prune Orchard Management Considerations
- July Prune Orchard Management Considerations
- August Prune Orchard Management Considerations
- Potassium review
- February Prune Orchard Management Considerations
- Fall & Winter Prune Orchard Management Considerations
- November Prune Orchard Management Considerations
- October Prune Orchard Management Considerations
- June Prune Orchard Management Considerations
- Preharvest & Harvest Prune Orchard Practices in a Tough Year