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.
citrus brown rot in canopy

Praise the Rain, Pass the Fungicide

March 6, 2024
By Ben A Faber
Although, it's probably too late for the fungicide to correct Citrus Brown Rot and Septoria on coastal lemons. In normal rainfall years, a skirt spray of copper is done to prevent rain splash bringing spores of various Phytophthora species in contact with fruit.
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Boron on Olives?

March 4, 2024
Pre-bloom foliar boron application on olive may improve yield Ellie Andrews, PhD, UCCE Farm Advisor, Sonoma County, and Elizabeth Fichtner, PhD, UCCE Farm Advisor, Tulare County Olive orchards entering an OFF year in 2024 may benefit from pre-bloom foliar boron (B) applications to support reproducti...
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rain gauge

Winter Notes from an Organic Avocado Grower

February 20, 2024
By Ben A Faber
By Shawn Martin, organic grower and CA Avocado Society Board member It's never clear what winter will deliver to a coastal avocado grove on a steep slope, so the grower must be ready for whatever happens. And the main thing is rainfall. And Frost. And sometimes drought. And be ready for fire.
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