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2022 CRB Webinar Series: Overview of Sweet Orange Scab (Elsinoё australis) and Citrus Canker (Xanthomonas citri subsp. citri) and their potential impact on citrus production in California

Dr. Jim Adaskaveg will provide an Overview of Sweet Orange Scab and Citrus Canker:

Sweet orange scab (SOS) is caused by the fungus Elsinöe australis. Sweet orange and tangerine are common hosts, however all Citrus including lemon are susceptible. SOS can cause premature fruit drop and stunt young nursery trees and new field plantings. Although SOS is mostly a cosmetic disease, the blemished fruit has reduced marketability. Since 2013, SOS has been found in Southern California, and detection locations are now in “regulated areas” and proposed for quarantine. Citrus canker is caused by the bacterium Xanthomonas citri subsp. citri. The disease is not known to occur in California but is known in Florida, Louisiana, and most recently, in Texas. Therefore, it is a potential invasive disease to California. Canker can significantly affect the vitality of citrus trees, causing leaves and fruit to drop prematurely. Most importantly, fruit infected with canker reduces the marketability as fresh fruit. SOS and canker are quarantine diseases that can affect international trade of California citrus. Inoculum sources, dispersion, conditions of infection, symptoms, and management practices will be discussed for both SOS and canker.

Sonia Rios, Area Subtropical Horticulture Advisor, Cooperative Extension - Riverside - will be opening the webinar with a regional farm advisers update.

CE Units:
This webinar is approved for 1-hour of “Other” continuing education units from the California Department of Pesticide Regulation (CDPR) and 1-hour of IPM from Certified Crop Advisers (CCA).

Just as a reminder, here are the requirements for receiving the CEUs:
-register separately with your own name and email address and log in from your own device
-participate in the entire session
-complete and pass a final test with 70% or higher; if not passed, the test can be retaken

If you are not familiar with Zoom, log in a few minutes early to familiarize yourself with the Zoom interface.

Jun 21, 2022 10:00 AM in Pacific Time (US and Canada)