Weed Day 2018

A sold-out crowd attended the 62nd annual Weed Day at UC Davis to learn about weed control practices; herbicide resistance and symptomology; aquatic weeds; weed management in vineyards, orchards, beans, and rice; and weed identification (including apps for weed ID).

Weed Day is coordinated by the UC Weed Research and Information Center. Participants include academics from the UC Davis Department of Plant Sciences, UC ANR and UC Cooperative Extension (UCCE), and other universities, along with growers, representatives from pest management and other agricultural industry companies, government and other land-management agencies, commodity groups, and agricultural-focused media.

Brad Hanson, weed specialist at UC Davis and UC ANR, addresses herbicide symptomology at Weed Day. (photo: Ann Filmer/UC Davis)

The all-day program includes morning tours of field research plots at UC Davis, followed by lunch, and an afternoon of classroom presentations. The exchange of information throughout the day is useful for both attendees and the researchers who focus on weeds and weed management.

Epinastic (twisted) growth on pumpkin plants from misapplied aminopyralid. (photo: Ann Filmer/UC Davis)

Brad Hanson, a Cooperative Extension weed specialist, and a faculty member in Plant Sciences, started the day with a welcome to the many participants, followed by demonstrations of herbicide symptomology. Hanson thanked the many UC personnel who helped make Weed Day successful – research faculty and staff, postdocs, students – and the companies that provide financial support for Weed Day.

Mark your calendars for the next Weed Day: Thursday, July 11, 2019

THIS YEAR’S PROGRAM (July 12, 2018):

Field Applied Research and Demonstrations

Research Presentations

  • Weed management in California beansMariano Galla (UCCE Glenn Co.)
  • Effects of saline irrigation water on saflufenacil partitioning in two California orchard soilsKatie Martin, Brad Hanson (UC Davis)
  • Effect of elevated CO2 levels and increased temperatures on glyphosate efficacy – Maor Matzrafi, Marie Jasieniuk (UC Davis)
  • Respiratory protection for weed control personnelLisa Blecker (UC IPM, UC ANR)
  • Medusahead: Could a tree and vine herbicide be part of the solution?Tom Getts (UCCE Lassen Co.)
  • California rice: Planting depth influences crop stand and weed controlAlex Ceseski, Kassim Al-Khatib (UC Davis)
  • Time-specific weed management – Mohsen Mesgaran (UC Davis)
  • What smartphone apps are available for weed ID and how good are they?Lynn Sosnoskie (UCCE Merced)
  • Weed versus crop differentiation using a crop marking system with an intelligent cultivator – HannahJoy Kennedy, Steve Fennimore (UC Davis, UCCE)

[Article by Ann Filmer, Dept. of Plant Sciences, UC Davis]

Mark Bell (left), UC ANR Vice Provost of Strategic Initiatives and Statewide Programs, discusses the importance of weed research with Professor Kassim Al-Khatib, a weed scientist at UC Davis. (photo: Evett Kilmartin/UC ANR)
John Madsen and Brenda Grewell (right) highlight aquatic weed research at the USDA-ARS Aquatic Weed Lab at UC Davis. (photo: Ann Filmer/UC Davis)
Water primrose, an invasive aquatic weed in California waterways, is being studied at the Aquatic Weed Lab. (photo: Ann Filmer/UC Davis)
John Roncoroni, a weed advisor in Cooperative Extension, addresses preemergence herbicide frequency in winegrape vineyards. (photo: Ann Filmer/UC Davis)
The Acqua Knife waterjet cultivator creates a high-pressure “tornado” (middle photo) that tears up weeds in vineyards. Bottom photo shows the clean strip of land after passage of the cultivator. (photo: Ann Filmer/UC Davis)
Herbicide efficacy treatments in walnut orchards is seen in Brad Hanson’s research plots. (photo: Ann Filmer/UC Davis)

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