Subtropical Fruit Crops Research & Education
University of California
Subtropical Fruit Crops Research & Education

We are San Diego & Riverside County Farm Advisors

HLB - Potential Threat Near San Diego County

HLB detected in Riverside County:

http://www.pe.com/2017/07/26/killer-citrus-disease-huanglongbing-found-in-grapefruit-tree-at-riverside-residence/ 

The Asian citrus psyllid is a tiny, mottled brown insect about the size of an aphid that poses a serious threat to all of California's varieties of citrus (e.g., oranges, grapefruit, lemons, and mandarins).

Asian_citrus_psyllid_D._citri_adult

The insect is associated with the fatal citrus disease Huanglongbing (HLB), also called citrus greening disease. The psyllid takes the bacteria into its body when it feeds on bacteria-infected plants and spreads when a bacteria-carrying psyllid flies to a healthy plant and injects bacteria into it as it feeds.

HLB can kill a citrus tree in as little as five years, and there is no known cure. All commonly grown citrus varieties are susceptible to the disease.

The only way to protect trees is to prevent spread of the HLB pathogen in the first place, by controlling psyllid populations and removing and destroying any infected trees.

Learn more about HLB and how to protect your crops from it by following these links. 

LINKS:

News Stories:http://www.pe.com/2017/07/26/killer-citrus-disease-huanglongbing-found-in-grapefruit-tree-at-riverside-residence/

https://www.cacitrusmutual.com/hlb-detection-riverside-triggers-rapid-response-activities/ 

Distribution & Management: http://ucanr.edu/sites/ACP/ 

IPM Blog: http://ucanr.edu/sites/socalIPM/?blogpost=24776&blogasset=63455 

IPM Pest Noteshttp://ipm.ucanr.edu/PMG/PESTNOTES/pn74155.html 

California Citrus Pest & Disease Prevention Committee:  https://www.cdfa.ca.gov/citruscommittee/ 

http://www.californiacitrusthreat.org 

Topics in Subtropics Blog

  • After Flooding, Buried Trunks a Problem

    Added January 12, 2018
    buried tree trunk

    A trunk "below grade", that is a buried trunk, is a problem for most trees.  Willows and other riparian trees along water ways that are inundated regularly can adapt to a change in soil depth around their trunks.  That's not true of most of our...

  • Laurel Wilt Disease of Florida Avocado?

    Added January 10, 2018
    avocado collapse 1

             The Latest on Florida's LW Disease Recommendations for Laurel Wilt in Commercial Groves Jonathan H. Crane, Tropical Fruit Crop Specialist1, Daniel Carrillo, Entomologist – Tropical Fruits1, Edward...

  • Thinking of Using Drones for Weed or Fire Assessment Work?

    Added January 8, 2018
    drone

    Area IPM Advisor IPM Natural Resources Extension Coordinator Endemic and Invasive Pests and Diseases Strategic Initiative Leader UC Statewide IPM Program & UCCE   Aerial drones are cool.  But they can't do everything (just yet). ...

  • Name the Biggest TERRESTRIAL Organism

    Added January 5, 2018
    Amanita

    Mississippi State University Amanita muscaria fungus growing in a high elevation conifer forest in Hawaii. We can see much of this mushroom above ground, but it has an incredible structure under ground as well. Credit J Meulemans Have you ever...

  • Estimates of Agricultural Damage from Thomas Fire

    Added January 4, 2018
    fire NRCS damage

    As firefighters in Southern California worked to achieve full containment on the Thomas Fire, agricultural officials in Ventura County issued their first estimate of damage to crops and farm structures, reporting that losses will exceed $171 million,...

  • Soil, Water, Plants and More Conference

    Added January 3, 2018
    irrigATING CITRUS

    The California Chapter of the American Agronomy Society meets in Fresno this coming February 6-7.  This is a multi-day conference with numerous speakers covering all manner of agricultural and environmental issues primarily related to...

Avocado Production in California Books

Book 1: Background Information

In Book 1, Gary S. Bender, Farm Advisor, takes you through the history of the avocado industry in California and teaches you about grove development.

Browse by Chapter

Book 2: Cultural Care

Book 2 focuses on cultural care and includes articles on irrigation, fertilization, disease and insect control, vertebrate pest management, pruning and frost management. The author for most of the articles is Gary S. Bender, Farm Advisor for Subtropical Horticulture in San Diego County.

Browse by Chapter

Webmaster Email: rkrason@ucdavis.edu