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.
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hlb defprmed citrus

HLB Tolerance

December 12, 2024
By Ben A Faber
By Manjul Dutt, Sheetal Ramekar and Gary England The grapefruit was created by chance from a cross between a pummelo and a sweet orange. It was first discovered in Barbados in the 18th century. All the commercially sold grapefruits today trace their roots back to the Duncan variety of grapefruit.
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ground squirrel

IPM for Landscapers

December 10, 2024
By Ben A Faber
The University of California Statewide IPM Program presents the UC IPM Green Bulletin.
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HLB symptoms

California HLB Quarantine Area Expanded

December 6, 2024
By Ben A Faber
Agricultural officials recently expanded the areas in California quarantined for citrus greening disease [also known as huanglongbing (HLB)], which is spread by Asian citrus psyllids. The quarantined area in Orange and Riverside counties was increased by a total of approximately 31 square miles.
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field guide to soil burn

Fire Effects on Soil

December 4, 2024
By Ben A Faber
Fires are common and we usually just think of the effects it has on plants and structures, but what impact can it have on soil. I recently came across a guide book from the US Forest Service that addresses how to evaluate fire impact on soil. Following wildfires in the United States, the U.S.
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