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/
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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.