Topics In Subtropics

Topics in Subtropics Summer 2024

Aug 21, 2024

This edition includes the following:

Cherimoya Growers Handbook Available On-Line
Learning From the Rain
Optimizing Avocado Irrigation Management Practices Using Soil Moisture Sensing
Pest Alert: Fig Wax Scale
Ag Labor Management Resources
Upcoming meetings
- Avocado Irrigation workshops
- Avocado Sunblotch Viroid (ASBVd)

Download (2,355KB PDF)

Topics in Subtropics Spring 2024

Jul 10, 2024

Effectiveness of Asian citrus psyllid management in huanglongbing treatment zones in residential Southern California
Managed honeybees in a wet year
Threats to citrus orchards in California by synergistic effects of dry root rot and phytophthora root and crown rot
Microbial Safety in Avocado Farms
How Much Fruit is Up there?
Tiny Troublemakers: How Geminiviruses are affecting California's Crops
Citrus Leprosis Disease – Staying alert on potential threat to California’s citrus industry

Download (1,668KB PDF)

Winter Issue - 2024

Feb 6, 2024

IRCHLB?
Pocket Gopher Management
Phytophthora Diseases of California Citrus
Airblast Sprayers
Temperature Inversion Data Helps Guide Frost Responses
Bodil Cass – New Subtropical Fruit IPM Specialist

Download (3,564KB PDF)

Topics in Subtropics Fall 2023

Oct 23, 2023

TOPICS IN THIS ISSUE:

IRCHLB?
Pocket Gopher Management
Phytophthora Diseases of California Citrus
Airblast Sprayers
Temperature Inversion Data Helps Guide
Frost Responses
Bodil Cass – New Subtropical Fruit IPM
Specialist

Download (1,059KB PDF)

Topics in Subtropics Summer 2023

Aug 4, 2023

Topics in this issue:

Avocado Production in the World: Observations of production and consumption growth
USDA-APHIS Approves New Fuller Rose Beetle Mitigation – a Voluntary Option to Reduce Pesticide Applications
DON’Ts – Suggestions for Citrus and Avocado Growers and Others
California Efforts to Control Citrus HLB
Dr. Hamutahl Cohen was appointed as an Entomology Advisor with UC Cooperative Extension in Ventura County

Download (785KB PDF)

Topics in Subtropics - Spring 2023

May 24, 2023

Download (1,036KB PDF)

Topics in Subtropics - Winter 2023

Feb 22, 2023

Topics in this issue:

Introducing Fetemeh Khodadi, Assistant Professor of Extension and Plant Pathologist
Agave Mites: A Tiny Menace
New pest in young avocado orchards
Planting Avocados
One, one hundred, one thousand
UCR Citrus Day, March 2, 2023

Download (13,948KB PDF)

Topics in Subtropics - Winter 2022

Mar 3, 2022

In this issue:

Mandarin Rind Breakdown
Breaking the Avocado Alternate Bearing Cycle
A Great Friend and Farmer has passed
Calculating the Value of Lemon Tree Loss

Download (512KB PDF)

Topics in Subtropics Spring 2021

May 20, 2021

Progress in Developing Mechanical Harvesting for California Black Ripe ‘Manzanillo’ Table Olives

Developing a Nitrogen Fertilizer Plan for Olive Orchards

Should I Pay for Avocado Pollination Services?

Collaboration is Key to Saving Kern County Citrus
Are Finger Limes Just Another Fad?

Download (1,063KB PDF)

Topics in Subtropics - Winter 2021

Mar 10, 2021

Topics in this issue:

Avocado Establishment Costs

Soil Analysis

Healthy Roots, Healthy Trees

Avocado Weed Control

Salt Leaching

Download (1,708KB PDF)

Topics in Subtropics Fall 2020

Nov 10, 2020

In this issue:

In memoriam: George Goodall
Promoting best practices for safe, economical and environmentally sound pesticide application with minimum environmental risks
South American Palm Weevil: Update
Lemon Establishment and Production Costs and Profitability Analysis in Ventura County, 2020
Brief update on ACP/HLB in California with emphasis on the San Joaquin Valley

Download (673KB PDF)

Volume 22, Spring 2020

Jun 17, 2020

An Automated Delivery System for Therapeutic Materials to Treat HLB Infected Citrus
On-Farm Research
Citrus Dry Root Rot
Dr. Beth Grafton-Cardwell to Retire

Announcements:
What are the UC Experts Talking About?

Memorial to Dr. Travis Bean

Download (614KB PDF)

Topics in Subtropics Spring 2019

May 23, 2019

Introducing Your New Information Source for CDFA grants, Kern and Ventura Counties

Spotlight on SWEEP in Citrus
Low Pressure Guide to Low-Flow Irrigation Scheduling

The So-Called “Leaf Fleck” Virus Diseases of Citrus

Replanting Trees in Mature Citrus Groves

What About Planting Lemons in Kern County?

Download (1,678KB PDF)

Volume 17, Fall 2018

Nov 7, 2018

California Citrus Network: an online forum to facilitate communication and information exchange regarding California citrus
High Density Planting for Avocado Production: A Chilean Perspective
Avocado Brainstorming 2018
Meet our new subtropical crops specialist at UC Riverside
Fall Citrus Meeting Reminder

Download (911KB PDF)

Vol 17, Summer 2018

Oct 1, 2018

TOPICS IN THIS ISSUE:

• Native Pollinators of California Avocado as Affected by Introduced Pollinator Gardens

• Which Way World Avocados?

• Evaluating Cost Effectiveness of High Density Planting of Avocados: Experiment on Water and Pruning

• Herbicide injury in avocados

Download (521KB PDF)

Topics in Subtropics Spring 2018

May 14, 2018

Topics in this issue:

A Taste of Coffee
Colletotrichum Shoot Dieback: A New Disease of Citrus in California
Successfully Irrigating Potted Trees
An Update on Huanglongbing disease of Citrus in California

Download (1,076KB PDF)

Volume 15, Fall 2017

Nov 21, 2017

TOPICS IN THIS ISSUE:

Ah, Rats!
So you want to install soil moisture meters?
Notes on applying Gibberellic Acid (GA) to Navels in the Southern San Joaquin Valley of California
Fall leaf tissue sampling
FREE! Citrus: UC IPM Pest Management Guidelines

Download (872KB PDF)

UPDATE ON PESTICIDE SAFETY TRAININGS 2017

Oct 11, 2017

*file271762*

Download (160KB PDF)

Spring Issue Vol.14 Issue 1

Apr 19, 2016

Avocado Cultivars, Botanical Races and Genetic Footprints

Drought Induced Problems in Our Orchards

Download (953KB PDF)

Winter 2015 Vol. 13 Issue 4

Jan 6, 2016

Blossom End Rot of Citrus

Using Organic Herbicides in Production Fields and Non-Crop Areas

Pocket Gopher and Ground Squirrel Control: Management Options for Citrus and Avocado Groves

What is that in My Grove, Horseweed or Hairy Fleabane?

Upcoming Programs and Schedules

Download (1,733KB PDF)

Fall 2015 Vol. 13 Issue 3

Sep 10, 2015

Predicting Water Demand Along the Coast Versus in the Valley

Avocado Farm Families Still Healing, More Than a Decade Later: What Lessons Have We Learned About Fire Readiness and Prevention?

Olive oil chemistry – Let’s talk about quality

Download (657KB PDF)

Summer 2015 Vol. 13 Issue 2

Jun 25, 2015

In this issue:

Did a Newly Introduced Fukumoto Navel Budline from Spain Perform Better than the California Budline in the San Joaquin Valley?

What values should olive growers use for estimating crop nitrogen removal at harvest?

Download (1,124KB PDF)

Polyphagous shot hole borer (PSHB) update for avocado growers
Weed Management in Citrus
UC Davis Olive Center: Sensory Evaluation of Olive Oil Certificate Courses
Water Terminology
Olive Quick Decline in Italy is associated with unique strain of Xylella fastidiosa

Download (746KB PDF)

Pesticide Worker Safety Training

Oct 13, 2014

Pesticide Worker Safety Training Registration

Download (112KB PDF)

Vol. 12, No. 2, Spring 2014

Aug 13, 2014

In this Issue:

Vole Damage to Citrus
Time to Go Fishing!
'Meyer' Lemon and C-35 Citrange Rootstock
Are Hops a Serious Option for a Crop in San Diego County?

Download (1,257KB PDF)

Volume 11, No. 4

Jan 10, 2014

In This Issue:

Rehabilitating Frost Damaged Citrus and Avocado
Advances in mitigation of alternate bearing of olive: vegetative growth response to plant growth regulators
Fertigation - Measuring Uniformity
Olive Fly Update

Download (537KB PDF)

Vol. 11 No. 3, September/October 2013

Nov 1, 2013

In this Issue:

Olive Tree Phenology
Training and Pruning of Cherimoya
High Density Avocado Installation: Use a quick cost study to make a decision
Volatile Organic Compound (VOC) Emissions from Pesticides

Download (565KB PDF)

Spring 2013 - Volume 11 No. 2

Jul 30, 2013

In this Issue:

Cultural Practices to Reduce Pest and Disease in Avocado and Citrus
Polyphagous Shot Hole Borer in California
Electronic "sniffer" for Detecting HLB
Important Information Sources Related to Fire Management and Protection
Bee kill in Oregon - A reminder of pesticide use

Download (405KB PDF)

Volume 11, No. 1

Apr 8, 2013

In This Issue:

Costs of Orchard Establishment and Production Summary for Avocados in California
Huanglongbing Conference, Florida
Going Out of Business in the Citrus Business - Doing it the Right Way
The Avocado: Botany, Production and Uses, 2nd Edition
Winter Irrigation
Update from Israel on the Polyphagous Shot Hole Borer and Fusarium symboint

Download (7,995KB DOC)

Volume 10, No. 3

Jan 4, 2013

Asian Citrus Psyllid Quarantines
Decline of Oranges and Mandarins
Mitigation of Alternate Bearing in Olive
Alternate Bearing in Mandarin

Download (839KB PDF)

Volume 10 No. 2

Sep 27, 2012

Simazine Degradation in CA Citrus Orchards
Lime-induced Iron Chlorosis
Avocado Trunk Cankers
Asphyxiation
Tree Wraps
Stem and Leaf Blight

Download (971KB PDF)

Vol. 10 No. 1 January-March 2012

May 25, 2012

In this Issue:

*Quarantine for Huanglongbing

Declared in Hacienda Heights

Section of Los Angeles County

*An Outline of Management Options for HLB in Florida

*Avocado Farming with High Priced Water

*Soil Moisture Sensors

Download (1,403KB PDF)

Winter 2011 - Volume 9 No. 2

Jan 18, 2012

In this Issue:

Vertebrate Damage

Chemical Thinning of Olives

Tips on Producing the Earliest Early Citrus in the San Joaquin Valley

Herbicide Registration Chart

Resource and Market Information for Enterprise Selection

Download (1,450KB PDF)

March thru June 2011

Aug 23, 2011

In this Issue:

Organic Herbicides: Do They Work?

Snake Oil: Horticultural Myths and Legends

Success Story before there is a problem

Download (820KB PDF)