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.
shot hole borer galleries
Topics in Subtropics: Article

Shot Hole Borer Studies are Going on Throughout Southern California

August 4, 2017
By Ben A Faber
Many growers don't hear about the amount of research and extension activity that is going on surrounding the Shot Hole Borers and Fusarium Dieback. This pest/disease complex affects not only avocados, but many other tree species, including many California natives.
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Sun Blotch Branch

Let’s talk about Avocado Sunblotch Viroid

August 2, 2017
By Sonia I Rios
Photo: Sun Blotch Branch Sun-blotch, a viroid disease affecting the avocado, was observed as early as 1914 in Southern California. Sun-blotch is widespread in California, and likely to be found in all districts where avocados are being grown.
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soil shells

Carbonateceous Soils and Gypsum

July 28, 2017
By Ben A Faber
Carbonateceous? Gypsum? Read on. Soil pH or the acidity or lack of acidity of a soil can be confused by the different uses and chemistries that surround the term pH, or the power of hydrogen.
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HLB symptoms

HLB Tree Confirmed in Riverside

July 27, 2017
The California Department of Food and Agriculture (CDFA) and the United States Department of Agriculture (USDA) have confirmed the detection of the citrus disease known as Huanglongbing (HLB), or citrus greening, in Riverside County.
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