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Citrus InformationDr. Robert McNeil, emeritus professor of the Fruit Science Department at Cal Poly San Luis Obispo, taught citriculture and avoculture there for many years.  He has made his citrus notes available on our website - https://ucanr.edu/sites/default/files/2025-07/mc%20neil%20citrus%20guide…

Federal and state agriculture officials recently expanded the areas quarantined for citrus greening disease in California. They expanded the quarantined area in the Coto de Caza area of Orange County by 11 square miles, the Rancho Santa Margarita area of Orange County by 93 square miles, the Perris area of…

Brown Marmorated Stink Bug showed up in Santa Barbara and Ventura Counties about 12 years ago. It had been roaming around LA and Orange Counties before that.  There was a small outbreak on avocados at the time, but it was mainly seen on a lot of other plant species, like tomatoes.  We have not seen…

We are excited to announce the launch of the California Water Course (register here), a bilingual (English/Español) program designed for entry level water professionals (or refresher), community and advocates, or any person interested in addressing California’s water challenges and solutions.This…

Native to South America, Argentine ants were introduced to California in 1905. Today, 90% of Southern California and coastal orchards are infested with ants. Some trees experience up to 1 million ant visits per day.Ivan Milosavljević, Citrus Research Board (CRB) entomologist, presented that information in a…