Topics in Subtropics

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...

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.

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.

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.

Here are the top 10 blogs from Topics in Subtropics over the last 5 years. The two earliest and latest pertain to how you select products that will truly help you from amongst all those that are being promoted. Some of these have been around a long time, so that's why they are the most read.