Bright orange and yellow California poppy flowers blooming in a green field under a clear blue sky.
Cooperative Extension Ventura County

Topics in Subtropics

Temas en cultivos Subtropicales

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TEMAS EN ESTA EDICIÓN

• Prácticas de riego y manejo del agua en aguacates
• Asfixia radicular
• Actividad de celulasa en acolchados contra enfermedades de Phytophthora
• Alerta de plagas en guayaba
• Poniendo a las abejas a trabajar para identificar Sunblotch
• Resultados de ensayos de campo: investigación de insecticidas para trips de los cítricos
• Y un excelente taller en las próximas semanas

Cooperative Extension Ventura County

Topics in Subtropics Winter 2026

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TOPICS IN THIS ISSUE 

  • Irrigation Practices and Water Management in Avocados
  • Asphyxiation
  • Cellulase Activity in Mulches
  • Guava Pest Alert
  • Putting Bees to Work to ID Sunblotch
  • Field Trial Results You Can Use: Citrus Thrips Insecticide Research
  • And three great workshops coming up 
Cooperative Extension Ventura County

Topics in Subtropics Fall 2025

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TOPICS IN THIS ISSUE 

TEMAS EN ESTA EDICIÓN

  • Resumen sobre la producción de dátiles
  • Directrices para el control del oídio de la uva
  • Pudrición seca de la raíz de los cítricos: una plaga persistente causada por el Fusarium solani en California
  • La detección de plagas es necesaria para el estudio de investigación
  • Las hojas de aguacate han evolucionado en el control la humedad
  • La guía del aguacate desde Australia
  • La nueva publicación de UC ANR, Olive Production Manual for Oil (Manual de la producción de aceite de oliva) ¡ya está disponible!
  • Presentación de Matthew Fatino
Cooperative Extension Ventura County

Topics in Subtropics Summer 2025

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TOPICS IN THIS ISSUE

• The Role of Pollinators in Avocado Production 

• Is that a Fruit Fly?

 • Sivanto Labeled for Control of Pink Hibiscus Mealybug in Dates 

• Consperse Stink Bug 

• Insights on 2025 Honey Bee Losses 

• Upcoming Meetings

Cooperative Extension Ventura County

Topics in Subtropics Spring 2025

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TOPICS IN THIS ISSUE


• Bifenthrin application added as an option to Fuller Rose Beetle Mitigation with Voluntary Sampling to Reduce Pesticide Application
• Selective Egg Staining: a New Tool to Support Breeding of Whitefly Resistant Crops
• Sunblotch! New Tools to Spot This SneakyAvocado Thief
• The Avocado Cone Roller Moth Is Here to Stay—Now What?
• Spring Subtropics Meetings Recap & Upcoming Meetings
o Citrus Meeting at Lindcove
o Avocado Field Day
o Microirrigation for Crop Production

Cooperative Extension Ventura County

Topics in Subtropics Fall 2024

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This edition includes the following:

  • Preparing Frost Protection Measures
  • The National Clean Plant Network, with emphasis on the National Clean Plant Network — Citrus
  • Development of integrated pest management for huanglongbing (HLB) in Florida
Cooperative Extension Ventura County

Topics in Subtropics Summer Issue 2024

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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)
Cooperative Extension Ventura County

Topics in Subtropics Volume 25 Winter 2024

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Sandipa Gautam, Editor
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
Cooperative Extension Ventura County

Topics in Subtropics Volume 24 Fall 2023

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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
Cooperative Extension Ventura County

Topics in Subtropics Volume 23 Summer 2023

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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.
Cooperative Extension Ventura County