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

  • Annual Avocado Meeting

    Added October 17, 2017
    CAS logo

                 California Avocado Society's                   2017 Annual Meeting This year marks our 102nd Annual Meeting and it will be held in Ventura County on...

  • That Black Hearted Pomegranate

    Added October 16, 2017
    blaCK HEART POMEGRANATE

    Pomegranate (Punica granatum) is a specialty crop now grown on more than 10,000 acres in California.  Pomegranate production has increased for both fresh market and juice in the last several years, and with this increase, random internally rotted...

  • What's More Delicate than an Egg?

    Added October 12, 2017
    kadota fig

     A fig. A yellow fig. A most delicious 'Kadota' fig.  A piece of fruit that falls apart easily and shows every nick, scrape and bump.   And it doesn't take much to reduce a fig to something that is not very attractive to a...

  • Avocado Educational Grower Seminar Series Continues to Progress and Benefit California Growers

    Added October 12, 2017
    Avocado meeting

    California produces about 90 percent of the nation's avocado crop. California avocado growers compete in both the domestic and international markets with countries with much lower costs of production and labor availability. To stay competitive will...

  • What is Pollinating that Plant?

    Added October 11, 2017
    syrphid adult

    You always wanted to know what pollinated rambutan, litchi, blueberries and all those other plants dependent on insect pollen movement?  O yes, and also what is pollinating avocado? Insect Pollination Of Cultivated Crop Plants by S.E....

  • Green Stink Bugs in Macadamias

    Added October 9, 2017
    5 instars

      The green stink bug is the dominant species found in fruit and nut trees; the others are found primarily in vegetables. Stink bug infestations originate when adults fly in from weedy areas. Damage is often limited to the edges of fields...

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