Topics in Subtropics

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.

Rehabilitation of Freeze Damaged SubtropicAL

September 8, 2015

By Ben A Faber

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What Lessons Have We Learned About Fire Readiness and Prevention?

September 8, 2015

Sonia Rios, Area Subtropical Horticulture Advisor, Riverside & San Diego Counties Henry Herrera, Forester, California Department of Forestry and Fire Protection (CAL FIRE) Gary Bender, Subtropical Horticulture Advisor, San Diego County This is a reposting of a blog from 2015 that is still pertinent...

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Sugary exudate on trunks or branches may indicate a PSHB attack. Note that exudate may be washed off after rain events and therefore may not always be present on a heavily infested branch.

Polyphagous Shot Hole Borer: San Diego Population Now Known as Kuroshio Shot Hole Borer

September 4, 2015

By Sonia I Rios

Through DNA sequencing, UCR entomologist have determined that we have two separate invasions of the Polyphagous Shot Hole Borer (PSHB) here in southern California attacking avocados. One invasion in San Diego County and the second in Los Angeles County.

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What to Expect of Young Trees or Teach your Children Well

September 2, 2015

By Ben A Faber

The first years of a tree's life are for building a structure for the future. Many varieties of trees are precocious and will bear fruit when they should be building structure.

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Wow,There are so Many Avocados on my Tree! Should I Apply NItrogen at this Time?

August 31, 2015

By Ben A Faber

Nitrogen and its Effect on the Balance of Vegetative and Reproductive Growth With the big avocado crop out there, the question came up about whether a grower should add extra nitrogen to encourage more canopy growth to protect the fruit from sunburn or whether that would cause the fruit to drop.

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