Roger Duncan

 Pomology Farm Advisor 

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 Please add your comments to our Pomology Guestbook

 

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 Links:

University of California Fruit and Nut Research Center:
http://fruitsandnuts.ucdavis.edu/

UC Pest Management Guidelines:
http://www.ipm.ucdavis.edu

2008 Efficacy and Fungicide Timing: http://www.ipm.ucdavis.edu/PDF/PMG/fungicideefficacytiming.pdf

Run Models and Calculate Degree Days for Management of Insect Pests
http://www.ipm.ucdavis.edu/WEATHER/ddretrieve.html

Cost and Return Studies
http://coststudies.ucdavis.edu/

Fruit and Nut Chill Accumulation/Harvest Prediction Calculation
Information about Pomology Weather Services 

Almond Nitrogen Fertilization Model Worksheet

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  Publications:

 
Almonds

• Boron in Bloom Sprays
• Boron PCA Connection
• Choosing an Almond Variety
• Dormant Sprays & Scale
• Evaluation of Rootstocks for Performance in Bacterial Canker Sites
• Fall Foliar Urea for Bacterial Canker Management
• Fall Nutrition for Almonds
• Fall Urea Sprays
• Final Shred Report - May 2001
• Glyphosate-Resistant Horseweed in California
• Herbicides Registered in Almonds in California, by Kurt Hembree, Farm Advisor, Fresno County, 2006
• Hull Samples
• Leaf Analysis
• Lower Limb Dieback Disease
• Lower Limb Dieback Update
• Managing Almond Hull Rot & Stick Tights
• McKenry's IPM Replant Guidelines
• Oblique-Banded Leaf Roller
• Orchard Replant Preparation
• Peach Tree Borer
• PMA Seasonal Guide
• Post-Harvest Boron Applications can Increase Almond Yields
• Potassium Deficiency
• Pruning & Spacing ABC Final Report
• Pruning First-Leaf Trees
• Replacing Bud Failure Trees
• Rootstock Trial ABC Final Report
• Rootstock Trial Handout
• Silverleaf Diease
• Silverleaf Disease Management
• To Remove or not to Remove - Trees in a Double Planted Orchard - That is the Question
• Tree Planting Tips
• Tree Planting Tips for Almonds and Stonefruit
• Verticillium Wilt

Grapes

• Glyphosate-Resistant Horseweed in California
• Grape Bunch Rot Management
• Mechanical Pruning of Wine Grapes
• Powdery Mildew
• Rot Summary 97-99
• The Vine Mealybug Threat
• Vine Mealybug in Stanislaus County

Peaches & Nectarines

• 2006 Bacterial Canker Report
• Cal Ag Peach Replant and Fumigation Article 2005
• Chemical Blossom Thinning of Peaches
• Evaluation of Rootstocks for Performance in Bacterial Canker Sites
• Fall Foliar Sprays for Peaches and Almonds
• Fall Foliar Urea for Bacterial Canker Management
• Fall Urea Sprays
• Final Report to Cling Peach Board 2003
• Glyphosate-Resistant Horseweed in California
• Growing Processing Cling Peaches in California 2007
• Leaf Analysis
• McKenry's IPM Replant Guidelines
• New UC Cling Peach Varieties
• Oblique-Banded Leaf Roller
• Orchard Replant Preparation
• Peach Leaf Curl
• Peach Seasonal Guide
• Peach Tree Borer
• Phytopathology N & CA vs. Canker
• Powdery Mildew
• Pre-Plant Fumigation
• Pre-Plant Fumigation is Worth the Money
• Replant Trial Final Report
• Results of Fumigation Trial
• Silverleaf Disease
• Silverleaf Disease Management
• Tree Planting Tips
• Tree Planting Tips for Almonds and Stonefruit
• Verticillium Wilt

  

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Slide Presentations from Previous Workshops

North San Joaquin Valley Almond Days:

2009 NSJV Almond Day

• Evaluation of New Microsprinklers for Resistance to Clogging Due to Fuller Rose Beetle Egg Laying
• Integrated Management of Mites in Orchard Systems
• Irrigation and Salinity Management In a Dry Year(s)
• Recognizing and Managing Almond Trunk and Scaffold Diseases
• The Effect of Almond Variety Arrangement on Yield

2008 NSJV Almond Day

• Almond Irrigation, Water Stress & Productivity - Dr. Ken Shackel, Dept. of Plant Sciences, UC Davis
• Almond Pruning by the Numbers - Roger Duncan, Pomology Advisor, UCCE Stanislaus County
• Soil Microbial Community in Almond Replant Disease - David Doll, Pomology Advisor, UCCE Merced County
• Weed Control & Label Updates in Almonds - Kurt Hembree, Weed Advisor, UCCE Fresno County
• Predicting Navel Orangeworm Damage - Dr. Joel Siegel, Research Entomologist, USDA ARS, Parlier, CA
• Worksheet for Predicting Navel Orange Worm Damage - Dr. Joel Siegel, Research Entomologist, USDA ARS, Parlier, CA
• Organic Almond Disease Control - Dr. Brent Holtz, Pomology Advisor, UCCE Madera County

  

North San Joaquin Valley Cling Peach Seminars:

2008 Cling Peach Seminar

• Mechanical Pre-Thinning
• Mechanical Thinning Video
• Modesto Fruit Talk
• Oriental Fruit Moth
• Thinning Video

2007 Cling Peach Meeting Podcasts

• Update on laws and regulations for orchardists -Denny Hoeh, Stanislaus County Ag Commisissioner's Office
• Monitoring OFM in pheromone-treated orchards and use of supplemental insecticides - Walt Bentley, IPM Specialist, UC Kerney Ag Center
• Early spring effects on fruit growth - Roger Duncan, UCCE Farm Advisor, Stanislaus County
• Results of local chemical thinning trials using ammonium thiosulfate & a surfactant - Roger Duncan, UCCE Farm Advisor, Stanislaus County - Kitren Glozer, UC Davis
• Decreasing reliance on hand labor-mechanical thinning experiences in the Sacramento Valley and future UCCE efforts - Kitren Glozer, UC Davis
• Results of local mechanical pre-thinning efforts - Maxwell Norton, UCCE Pomology Advisor, Merced County

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Other Slide Show Presentations:

Almond Slides

• Almond Orchard Design
• Choosing the Right Rootstock for your Almond Orchard
• Control of Oblique-Banded Leafroller in Almonds
• Environmentally Friendly Almond Pest Management
• Environmentally Responsible Almond Pest Management
• Field Evaluation of Alternative Rootstocks for Almonds and Peaches
• Integration of Tree Spacing, Pruning and Rootstock Selection for Efficient Almond Production
• Orchard Design for MJC
• Performance of New Rootstocks for Almonds and Stonefruit - Nematology Conference 2007
• Planning and Development of a Successful Almond Orchard
• Potassium Fertility in Almond Production
• Potassium Needs for Almond - AAIE
• Spacing and Pruning Trial Talk - NSJV Almond Day, 2007
• The Almond Pest Management Alliance Project

Grape Slides

• Cover Cropping in Orchards and Vineyards
• Identification, Monitoring and Control of Vine Mealybug

Peach & Nectarine Slides

• Bacterial Canker Management - Peach Field Day 2006
• Bacterial Canker Suseptibility of Peach Almond Hybrid Rootstocks for Almond and Stonefruit Orchards
• Evaluation of Preplant and Postplant Treatments for Replanted Peach Orchards
• Field Evaluation of Alternative Rootstocks for Almonds and Peaches
• Performance of New Rootstocks for Almonds and Stonefruit-Nematology Conference 2007
• Performance of Six Peach Rootstocks in a Bacterial Canker Replant Site
• Preplant and Postplant for Peach (Yuba City)
• Reigel Rootstock Summary

  

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