We are San Diego & Riverside County Farm Advisors
HLB - Potential Threat Near San Diego County
HLB detected in Riverside County:
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).
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.
Distribution & Management: http://ucanr.edu/sites/ACP/
IPM Pest Notes: http://ipm.ucanr.edu/PMG/PESTNOTES/pn74155.html
California Citrus Pest & Disease Prevention Committee: https://www.cdfa.ca.gov/citruscommittee/
Topics in Subtropics Blog
Added September 22, 2017
The questions that come in stump many of us, but we often have ways of finding answers. Here's a recent request and Mary Lu Arpaia's response. She's one of our Postharvest Physiologist Specialists. The Question: "I am an extension...
Added September 20, 2017
2017 Pitahaya/Dragon Fruit Production Tour – Ventura UC Hansen Agricultural Research and Extension Center 14292 W Telegraph Rd. | Santa Paula, CA 93060 Enter on Briggs Road Entrance Phone: (805) 525-9293 |Fax: (805) 525-5475 Monday –...
Added September 18, 2017
Last May/June during a hot period and soon after fruit set, avocado growers and PCAs in the Oxnard/Camarillo area were calling in about young fruit about he size of a quarter showing up with white spots. Cutting into the fruit there might only be a...
Added September 15, 2017
Article written by UC Davis PhD student Caio Brunharo from his dissertation research. It was originally posted in the September 2017 "Weed Management Notes" newsletter from the UC Cooperative Extension office in Glenn County by new weed science and...
Added September 13, 2017
0University of California Cooperative Extension Area-wide IPM Advisor, Kearney Agricultural Research and Extension Center, Parlier, CA Leaffooted Bug Populations in Ventura County - 2017 Cold winter temperatures can reduce populations of...
Added September 11, 2017
Gopher Snakes (Pituophis catenifer), known as a constrictor snake, are one of the most commonly seen snakes in California. Mainly active during the day, they are active after sundown on hot days. They are often observed crawling across trails and...
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.
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.