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

Onion Projects

Thrips Control in Onions

Principle Investigator: Steve Orloff, County Director/Farm Advisor, Siskiyou County, Yreka.

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  • Evaluate the effectiveness of Minecto Pro and Exirel on thrips in the Klamath Basin
  • Evaluate thrips control using different insecticide sequences
  • Determine if an early application using a low initial threshold is beneficial or detrimental
  • Determine the impact of insecticide treatment on yield

Management of White Rot of Onions with Fungicides

Principle Investigator:  Rob Wilson, Center Director/Farm Advisor, UC Intermountain Research & Extension Center

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  • Demonstrate the effectiveness of DADS in lowering soil levels of white rot sclerotia.
  • Demonstrate fungicidal control of white rot in onions and garlic in plots with reduced soil sclerotia levels.

Onion Weed Control

Principle Investigator: Rob Wilson, Center Director/Farm Advisor, UC Intermountain Research & Extension Center

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  • Evaluate crop and weed response to varied rates and timings of pre-emergence applications of Prowl H2O and Dacthal.
  • Develop UC recommendations and California specific herbicide labels for weed control in onions.

Management of Seedcorn Maggot and Onion Maggot in Processing Onions

Principle Investigator: Rob Wilson, Center Director/Farm Advisor, UC Intermountain Research & Extension Center; Kevin Nicholson, Staff Research Assistant, UC Intermountain Research & Extension Center

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  • To evaluate different seed treatment options for applying spinosad to onion seed.
  • To test new active ingredients applied as a seed treatment and in-furrow spray.
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