Topics in Subtropics

The Argentine ant is the most widespread species of invasive ant, thriving in urban areas, agricultural settings and nature parks on every continent except Antarctica. The species can form "supercolonies" that link hundreds of nests and millions of workers.

Avocado Irrigation Workshop August 10 (Thursday), 2023 1:00 4:00 P.M. San Diego Farm Bureau 420 S Broadway, Escondido, CA 92025 Workshop registration link: https://surveys.ucanr.edu/survey.cfm?surveynumber=40798 1:00 - 3:30 p.m.

Invasive species are arriving in California with increasing frequency. The best time to stop them is before they arrive, and federal, state and local agencies are keeping their eyes out for new arrivals and threats on the horizon.

The California Department of Food and Agriculture (CDFA) regularly performs surveys across the San Joaquin Valley (SJV) to monitor for potential insect and pathogen issues for California agricultural producers.

There have been several recent questions about dealing with a plant floating in reservoirs. Here's Weed Scientist Emeritus Roncoroni's response to them. Pacific Mosquitofern, (Azolla filculoides) often referred to as Azolla, is native to California.