Topics for Subtropics Newsletters

Newsletters

This webpage houses the Topics for Subtropics newsletters for 2010-2023. To retrieve newsletters for later years click on the archive link to retrieve 2009-2003 newsletters: Archive

Newsletters 2010-2024

ISSUES	ARTICLES	DOWNLOAD FILES
2024, Vol 25, Winter	TOPICS IN THIS ISSUE:
	California inundated with invasive fruit flies Satellite-based irrigation tools to manage irrigation water more precisely in avocado groves Managing citrus mealybug-does ant control help? Phytoplasma Diseases of Palms in the USA Understanding fruit fly quarantines Cultivating Citrus Resilience to HLB in California Phenology and the Avocado The Annual California Avocado Society Meeting Pre-bloom foliar boron application on olive may improve yield	PDF
2023, Vol 24, Fall	TOPICS IN THIS ISSUE:
	IRCHLB? Pocket Gopher Managment Phytophthora Diseases of California Citrus Airblast Sprayers Temperature Inversion Data Helps Guide Frost Responses Bodil Cass - New Subtropical Fruit IPM Specialist	PDF
2023, Vol 23, Summer	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. DONT'S-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.	PDF
2023, Vol 23, Spring	TOPICS IN THIS ISSUE:
	Avocado Sunblotch Viroid Disease and Challenges to Tackle Citrus yellow ovein clearing virus, a new citrus pathogen identified in the San Joaquin Valley of California A pictorial guide to rind scarring damage on mandarins and sweet orange published! Insects in Common to Avocado and Introduced Habitat Gardens	PDF
2023, Vol 23, Winter	TOPICS IN THIS ISSUE:
	Introducing Fatemeh Khodadadi, Assistant Professor of Extension and Plant Pathologist Agave Mites: A Tiny Menace New pest in young avocado orchards Planting Avocados One, one hundred, on thousand UCR Citrus Day, March 2, 2023	PDF
2022, Vol 22, Fall	TOPICS IN THIS ISSUE:
	Mycorrhizae: An Underground Support Network for Trees. Notes on Applying Gibberellic Acid (GAS3) to Navel Orange and other Citrus in the San Joaquin Valley of California Saline Waters - A Growing Problem 35th Anniversary of the Nematode Quarantine Facility at the University of California Riverside	PDF
2022, Vol 22, Summer	TOPICS IN THIS ISSUE:
	Natural enemies have significantly suppressed Asian Citrus Psyllid populations in southern California Synergizing UPM of Argentine and biocontrol of sap sucking pests with biodegradable hydrogels, infra-red sensors, and cover crops in commericial citurs orchards Irrigation Stress and Early-Navel Fruit Maturity High Density Citrus Planting Eric Mussen, Apiculturist Passes	PDF
2022, Vol 22, Spring	TOPICS IN THIS ISSUE:
	Phytophthora diseases associated with citrus in California Is it root rot? Or? The 12 signs of ARR New avocado irrigation study GEM vs. Hass Area-Wide Treatment of ACP	PDF
2022, Vol 22, Winter	TOPICS IN THIS ISSUE:
	Area-Wide Treatment of ACPMandarin Rind Breakdown A Great Friend and Farmer Has Passed, James Lloyd-Butler Calculating the Value of a Lemon Tree Loss	PDF
2021, Vol 20, Fall	TOPICS IN THIS ISSUE:
	Estimating Nitrogen Credits From Organic Matter Sources in Orchards Timing Ethylene Applications as a Function of Heat Unit Accumulation. Summary of International Avocado Irrigation Trends The Avocado War has Lost a Star	PDF
2021, Vol 19, Winter	TOPICS IN THIS ISSUE:	PDF
	Avocado Establishment Costs Soil Analysis Healthy Roots, Healthy Trees Avocado Weed Control Salt Leaching
2020, Vol 18, Fall	TOPICS IN THIS ISSUE:	PDF
	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
2020, Vol 18, Summer	TOPICS IN THIS ISSUE:	PDF
	Proactive Management of the Avocado Seed Weevil, Heilipus lauri (Coleoptera: Curculionidae) False Chinch Bug in New Avocado Plantings Removing Avocado Suckers with Glyphosate Snapshot: The Mexican Date Industry UC Ag Experts Talk
2020, Vol 18, Spring	TOPICS IN THIS ISSUE:
	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	PDF
2020, Vol 21, Winter	TOPICS IN THIS ISSUE:	PDF
	Rattlesnakes in California Orchards: Growers Beware - Sonia Rios and Roger A. Baldwin What’s All The Fuss Over Spotted Lantern Fly? - Mark Hoddle Frost Freeze Recovery from February 2020 Sonia Rios and Ben Faber Covid Virus Resources New Guidelines for Laurel Wilt Disease
2019, Vol 21, Fall	TOPICS IN THIS ISSUE:	PDF
	Leveraging the Genomic Landscape of Avocado for Breeding Purposes (Vanessa Ashworth and Philippe Rolshausen) Fresh Market Raspberry in California (Natalie Solares and Alexander Putman) Weed Management in Citrus Orchards (Travis Bean)
2019, Vol 20, Summer	TOPICS IN THIS ISSUE:	PDF
	A “boring” problem that’s generating a big interest in southern California (Deena Husein) How ants can be “good” in ag production systems (Madison Sankovitz) Is Eucalyptus a Safe Material for Mulching Trees? (Ben Faber & James Downer) Botryosphaeria Gummosis and Dieback of Citrus (Dee Vega) The online Lucid Key, Thrips of California, has been updated (Mark Hoddle)
2019, Vol 19 Spring	TOPICS IN THIS ISSUE:	PDF
	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?
2019, Vol 18, Winter	TOPICS IN THIS ISSUE:	PDF
	Distinguishing Between Symptoms of Drought And Root Rot in Avocado Avocado Trunk Cankers Viruses Are Our Friends – and Maybe for Citrus Too Ground Squirrel and Other Vertebrate Control Meet our new Citrus Specialist at UC Riverside/Lindcove Meet our new Extension Tree Crops Spray Application Engineer UC Ag Experts Talk
2018, Vol.17, Fall	TOPICS IN THIS ISSUE:	PDF
	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
2018 Vol.17, Spring	TOPICS IN THIS ISSUE:	PDF
	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
2018 Vol.17, Summer	TOPICS IN THIS ISSUE:	PDF
	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 of Water and Pruning Herbicide injury in avocados
2018, Vol.16, Winter	TOPICS IN THIS ISSUE:	PDF
	South American Palm Weevil is a Threat to Coachella Valley Dates and Ornamental Palm Grower A Template for Estimating Value of Tree Loss After the Fire and Before the Rain, What to do.
2017, Vol.15, Fall	TOPICS IN THIS ISSUE:	PDF
	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
2017, Vol.15, No.1	TOPICS IN THIS ISSUE:	PDF
	A Blast from the Past, An Old Spacing Trial Revisited Shoot and Twig Dieback New Crops aka SpecialtyCrops aka Alternative Crops Referendum Comments
2017, Vol.14, No.5	TOPICS IN THIS ISSUE:	PDF
	Why has California red scale been so difficult to control? Navel Orange Nitrogen Fertilization Recent Advances in Understanding the History of Olive Domestication Upcoming UC Olive Center Events
2016, Vol.14, No.4	TOPICS IN THIS ISSUE:	PDF
	Real-Time Sensor for Early Detection of Citrus Huanglongbing (HLB) The 2016 International Citrus Conference UC Riverside Scientists Evaluate Trunk Injections of Pesticides for The Management of Ambrosia Beetles in California Avocados An Overview of Mango Water Based Latex Paint as a Means to Track Ambrosia Beetle Activity on Infested Trees
2016, Vol.14, No.2	TOPICS IN THIS ISSUE:	PDF
	“We Shall Defend our Citrus, We Shall Fight in Backyards and Community Gardens, We Shall Fight in Organic and Conventional Citrus Orchards; We Shall Never Surrender.” Organic Control of Asian Citrus Psyllid is Challenging Citrus Clonal Protection Program (CCPP) and National Clean Plant Network (NCPN): A Model System for Management of Citrus Diseases Discouraging citrus varieties smuggling by offering easy access to pathogen-tested budwood
2016, Vol.14, No.1	TOPICS IN THIS ISSUE:	PDF
	Avocado Cultivars Botanical Races and Genetic Footprints Drought Induced Problems in Our Orchards
2015, Vol.13, No.4	TOPICS IN THIS ISSUE:	PDF
	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 Grove
2015, Vol.13, No. 3	INTRODUCTION AND NEW RESEARCH:	PDF
	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
	Announcements:
	Breakfast IPM Meeting: Citrus IPM and Chlorpyrifos Regulatory Update
	Macadamia Association Annual Field Day

2015, Vol.13, No. 2	INTRODUCTION AND NEW RESEARCH	PDF
	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?
	UPCOMING COURSES:
	UC Davis Olive Center: UC Master Milling Certificate Course
	Polyphagous shot hole borer (PSHB) update for avocado growers
	Weed Management in Citrus

2015, Vol.13, No. 1	TOPICS IN THIS ISSUE:	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
2014, Vol. 12, No. 3	TOPICS IN THIS ISSUE:
	The Clegg Collection: A Valuable Resource Impacts of the recent drought conditions on Central Coast avocado production, and potential impacts of continued drought conditions Zinc and Phosphorus Recent findings on polyphagous shot hole borer/Fusarium dieback on avocado	PDF
2014, Vol. 12, No.2	TOPICS IN THIS ISSUE:	PDF
	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?

2014, Vol. 12, No.1	The Spanish Avocado Industry	PDF
	Strategizing for Water Cutbacks - Avocado and Citrus
	California Agricultural Production Statistics
	Maintaining the Citrus Orchard with a Reduced Irrigation Allotment
	The 2014 Drought in California

2013, Vol. 11, No. 4	Rehabilitating Frost Damaged Citrus and Avocado	PDF
	Advances in Mitigation of Alternate bearing of Olive: Vegetative Growth Response to Plant Growth Regulators
	Fertigation – Measuring Uniformity
	Olive Fly Update

2013, Vol. 11, No. 3	A Caution on Free “Compost/Mulch”	PDF
	Oriental Fruit Fly Affects Green Waste Movement in Southern California
	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

2013, Vol. 11, No. 2	Cultural Practices to Reduce Pest and Disease in Avocado and Citrus	PDF
	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

2013, Vol. 11, No. 1	Costs of Orchard Establishment and Production Summary for Avocados in California	PDF
	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 symbiont

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