Topics in Subtropics

The 2025 Crop Reports for California counties are starting to come in.  These are the details of what happened last year. They are the closest data we have for what is "currently" going on with a county's agricultural activity, so it's not right up to the minute.  It's up to the year.  Here…

The navel orange arrived in southern California and made growers rich, creating a citrus empire.  The 'Hass' avocado was found in an orchard in La Habra Heights and has spread around the world.  A wonderful documentary covering these two game changing fruit is covered in a recent documentary from…

Plant Growth Regulators: General Information Plant growth regulators are registered for use on California citrus toincrease fruit set.increase fruit size, either directly or indirectly by thinning (removing) fruit to increase the size of the remaining fruit.prevent fruit senescence.control preharvest…

Tuesday, June 23, 2026, at 10:00 AM ON THE GROUND WITH CA-CRAFT California Citrus Research and Field Trials (CA-CRaFT) was started in 2023 to develop practical, field-based ACP management strategies under real commercial citrus conditions across California. Since then, the program has expanded into a large,…

UC ANR Asian Citrus Psyllid Distribution & Management Website Evaluation SurveyWe are currently updating the UC ANR Asian Citrus Psyllid Distribution and Management Website, available here to review before this survey: https://ucanr.edu/site/asian-citrus-psyllid-distribution-and-management…