In 2017, I started getting reports of a watergrass biotype/species (Echinochloa spp.) that was difficult to control using our suite of herbicides registered in rice. At the time, I knew we had multiple herbicide-resistance in late watergrass (Echinochloa phyllopogon), so I initially just thought the resistant biotype was spreading, and had maybe gained resistance to additional herbicide modes of action. However, once I started visiting fields, it quickly became apparent that this was not late watergrass (phenotypically-speaking). It also did not appear to be barnyardgrass (Echinochloa crus-galli), although the Echinochloa species are notoriously difficult to identify, and phenotypically quite variable in...

If you missed this year's California Rice VIRTUAL Field Day, you can view it here.

California Rice Virtual Field Day

The full recording can be viewed here.

HIGHLIGHTED weed science presentations:

• 0:20:59 • Florpyrauxifen-benzyl (Loyant): A New Herbicide for California Rice • Kassim Al-Khatib, CE Specialist, Dept. of Plant Sciences, UC Davis
• 0:37:37 • Weedy Rice Trials and Herbicide Failures in the Field •...

If you didn't get a chance to listen to Whitney Brim-DeForest's webinar presentation on "Integrated Weed Management Rice Systems" (Part 3 of the UCCE Sutter-Yuba-Colusa Continuing Education Series), here it is:

https://www.youtube.com/watch?v=jSfCXFmOyXY

Whitney Brim-DeForest is the UC Cooperative Extension County Director (Sutter-Yuba counties) and Rice and Wild Rice Advisor (Sutter-Yuba, Capitol Corridor MCP, and Placer-Nevada...

SUPPRESS® herbicide EC, a product manufactured by Westbridge Agricultural Products, was registered in California in 2015. Its active ingredients are Caprylic Acid and Capric Acid. It is registered for use in organic production, and it is labeled for use in “agricultural food and non-food crops”. In rice, it can be utilized only when the field is drained (no standing water allowed).

Since 2019, UCCE Rice Advisor Whitney Brim-DeForest has been testing SUPPRESS® herbicide for use in weed control in rice. In 2019, she collaborated with Jim Cook (Colusa County Farm Supply), to spot spray weedy rice in a field containing Type 3 (long awns, straw hulled). The application was made with a handheld backpack sprayer, at...