- Author: Thomas Getts
When I was an undergraduate back in Colorado, I spent the vast majority of two summers mapping the waterways of Boulder County for invasive species. It was an excellent experience which got me jazzed about weed science. Fighting through the thorns of Russian olive groves, while picking the cheatgrass and houndstongue seeds out of my socks, I was experiencing first hand some of the impacts invasive species have. I quickly realized my discomfort was trivial to the impact these invasive weeds were having on native species.
One of the plants the Land Manager of Boulder County was most concerned about was myrtle spurge (Euphorbia myrsinites L.). Back in Colorado this creeping perennial is an A list noxious weed species...
- Author: Gale Perez
Here's a video (produced by Ray Lucas of UC ANR Communications Services) of the field tour of Weed Day 2017.
- Author: Brad Hanson
In case you weren't able to attend the 61st Annual Weed Day hosted by the UC Davis Weed Science Program and the UC Weed Research and Information Center, here's what you missed:
First, we had fantastic weather, only getting into the 90s by the end of the tour and an excellent turnout with around 140 attendees.
As we normally do, we started the day with a field tour. Our first stop was the longest and most diverse of the four locations. First, David Slaughter (Biological and Ag Engineering), Steve Fennimore, and HannahJoy Pheasant (UCD Grad student) discussed current research...
Weedy Rice Workshops 2017
August 9, 2017 :: 9:00 AM-12:00 noon
New Earth Market Harvest Room
1475 Tharp Road, Yuba City, CA
August 10, 2017 :: 9:00 AM-12:00 noon
3770 Hwy 45, Colusa, CA
In the workshops, University of California Cooperative Extension (UCCE) will give updates on the current weedy rice situation and research being conducted in California. Dr. Nilda Burgos, University of Arkansas, will give a presentation on...
- Author: Whitney Brim-DeForest
As many of you are aware, many of our grass species in California rice are resistant to multiple herbicides. Late watergrass aka "mimic" (Echinochloa phyllopogon), early watergrass (E. oryzoides) and barnyardgrass (E. crus-galli) are among some of our most competitive weed species, causing large yield reductions when uncontrolled.
One of the last remaining chemicals that our grass species are not yet resistant to is pendimethalin. Commercial formulations for pendimethalin registered for California rice are Prowl H2O and Harbinger. Prowl H2O is a delayed pre-emergent herbicide applied onto dry, drill-seeded fields. Harbinger is also a delayed pre-emergent herbicide, but the...