Intermountain Research and Extension Center
Intermountain Research and Extension Center
Intermountain Research and Extension Center
University of California
Intermountain Research and Extension Center

Alfalfa Projects

340-Alfalfa Variety Evaluation in Mountain Valleys of Northern California

Principal Investigator: Dan Putnam, Extension Agronomist, Dept. of Plant Science, UC Davis; Craig Giannini, UC SRA, UC Davis

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  • Evaluate certified cultivar differences in alfalfa forage yield, quality, and persistence, and to communicate these results to clientele
  • Develop and provide forage yield and performance data on alfalfa experimental germplasm to public and private alfalfa scientists

342-Improved Management of Alfalfa Weevil in California to Facilitate Water Quality Protection and Crop Sustainability

Principal Investigator: Rachael Long, Farm Advisor for Field Crops, Pest Management,

weevil larvae feeding on alfalfa
UCCE Capitol Corridor, Woodland, CA.

345-Cutting Schedule Effects on Reduced Lignin & Conventional Alfalfa

Principal Investigator: Dan Putnam, Extension Agronomist, Department of Plant Sciences, UC Davis

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  • Determine the effect of a 3-cut versus 4-cut harvest schedule on rate of forage quality change of genetically engineered low lignin alfalfa compared to the null that does not carry the trait and compared with a commercial standard
  • Determine the appropriate cutting management schedule for low-lignin alfalfa compared with conventional non-genetically engineered alfalfa

360-Resiliance of Alfalfa Cultivars to Variable Environments

Principal Investigator: Charles Brummer, Director, Plant Breeding Center, UC Davis.

  1. The main goal of this project is to develop methods to measure and understand the resilience of alfalfa cultivars to abiotic stresses, to: a) identify cultivars with superior resilience, b) identify alfalfa plant
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    traits associated with resilience, and c) study the relationship between productivity and resilience in alfalfa cultivars. To achieve these goals, a combined approach of a) long-term datasets analyses, b) field experiments and c) crop modeling will be used. Therefore, the project has the following objectives:

In California, we will conduct field experiments for Objective 2:

  1. To empirically measure resilience of alfalfa cultivars to water and cold stresses in controlled replicated field experiments across the USA, and identify plant traits associated with resilience.

366-Clover Root Cucurlio Management in Alfalfa Production

Principal Investigator: Rachael Long, Farm Advisor for Field Crops, Pest Management, UCCECapitol Corridor, Woodland, CA.

  • Track the activity of CRC life stages during the season to improve our understanding
    CRC
    of CRC biology and life history and of the conditions where CRC may be problematic, thus improving the timing and effectiveness of management decisions.
  • Evaluate biological and chemical pesticides for CRC suppression given that there are no registered soil active products.
  • Evaluate alfalfa varieties/lines that show resistance toward insect pests on CRC feeding and oviposition.
  • Collaboratively conduct multistate Extension programs that help alfalfa growers understand CRC activity and adopt CRC management strategies.

386-Evaluation of New Herbicide for Between Cutting Weed Control in Alfalfa

Principal Investigator: Thom Getts, UCCE-Lassen.

  • Evaluate the crop safety of various herbicides applied to alfalfa between
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    cuttings, including multiple rates of herbicide CNV2243.
  • Evaluate weed control efficacy of various herbicides applied to alfalfa between cuttings, including multiple rates of herbicide CNV2243.

387-A RR Alfalfa Injury

Principal Investigator: Tom Getts, UCCE-Lassen.

  • Is pseudomonas syringae responsible for alfalfa injury?
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  • What agronomic factors can reduce the risk of this injury?

387-B RR Alfalfa Injury - What's Happening?

Principal Investigator: Rob Wilson, Center Director/Farm Advisor, IREC.

  • Collaborate with Debby Samac with USDA-ARS to analyze alfalfa samples from several study sites to determine levels of syringae
    alfalfa
    bacteria in alfalfa samples after frost events and following glyphosate applications at different application timings to relate how glyphosate affects P. syringae levels at different growth stages.
  • Better document the injury and yield reductions associated with glyphosate at different growth stages to determine Roundup application times that cause the most and least crop injury.
  • Determine if suppressing P. syringae populations on alfalfa plant tissue with copper bactericides and mancozeb influence crop injury following glyphosate applications and frost.

397-Alfalfa Germplasm Evaluation-Fall Dormancy

Principal Investigator: Charles Brummer, Director, Plant Breeding Center, UC Davis; Dan Putnam, Extension Agronomist, Department of Plant Science, UC Davis.

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  • To develop a measurement method to assess dormancy in swards.
  • To evaluate fall dormancy of the standard check cultivars and selected other modern cultivars in both swards using the new protocol and in spaced plants using the current protocol.
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