UC Weed Science (weed control, management, ecology, and minutia)

On June 6, 2019 UC Cooperative Extension (UCCE) and burn boss Phil Dye led a 2.7-acre prescribed burn on a ranch in Bitterwater.

Many factors make weed management on federal public lands an interesting challenge. In September I was invited to join one of the Sierra National Forest Rangeland Management Specialists to explore a medusahead infestation in one of the grazing allotments she manages.

In late October we made our monthly trip to sample curlyleaf pondweed in the Sacramento-San Joaquin Delta. On an island in the lower San Joaquin river, we spotted goats eating waterhyacinth (Eichhornia crassipes) and waterprimrose (Ludwigia sp.) along the shoreline.

Its not too late to register for the San Joaquin Valley Spray Application Short Course (November 12-14). Here's a link to the webpage: https://ucanr.edu/sites/SJVSprayApplication/Home/ Here's a link to the full agenda: https://ucanr.

Exotic water primroses (Ludwigia spp.) are aggressive invaders in both aquatic and riparian ecosystems. The plants form dense mats over the water surface. These mats constrain navigation and interfere with recreational activities, irrigation, drainage, and agricultural production.