Topics in Subtropics

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Topics in Subtropics Blog
You can subscribe to this  blog with multiple entries per week reflecting what's happening with subtropical crops and upcoming educational events.  Just click on the "Subscribe" button just to the right of this paragraph.  There's also our seasonal quarterly Topics in Subtropics newsletter found at our Ventura, Santa Barbara, San Luis Obispo, Riverside, San Diego, Tulare and Kern Counties Cooperative Extension websites.
Dry Root Rot. Photo by Jack Kelly Clark.

Dry Root Rot of Citrus Orchards

May 16, 2012
Dry root rot has been a problem in citrus orchards for many years. Although generally a problem in coastal and northern California counties it has been reported in other citrus producing areas of the state.
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Vein clearing in Dweet Tangor.

Dweet Mottle Virus and Citrus Leaf Blotch Virus

May 7, 2012
The UC Riverside Citrus Variety Improvement Program (CVIP), the forerunner of the Citrus Clonal Protection Program (CCPP), began indexing candidate varieties in 1958. At that time, the full range of indicator plants that is utilized today was not known.
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Tea Shot Hole Borer (Euwallacea fornicatus). The pest is about the length of Lincoln’s nose on a penny. Photo by G. Arakelian.

Fusarium dieback on California avocado trees

April 18, 2012
While the Asian citrus psyllid/HLB pest-disease complex has received a lot of press lately, another deadly pest-disease combination has been found in Los Angeles County. Tea Shot Hole Borer (Euwallacea fornicatus) is a vector for the Fusarium fungus. A native from Asia, this beetle is very small.
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Hope for citrus

April 10, 2012
Research to fight Huanglongbing (HLB), the deadly citrus disease carried by the Asian citrus psyllid, is taking place throughout our nation and the world. Industry-wide urgency is funding a variety of research in search of a solution.
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