Field day provides glimpse of how onion varieties fare against each other
ONTARIO, Ore. — When it comes to assessing how well various onion varieties grow in the Treasure Valley area, Oregon State University’s annual onion variety trial field day is a top destination for growers, seed dealers and industry representatives.
The OSU onion variety field day is one of several held around the Pacific Northwest this week but it’s particularly popular because it provides an impartial look at how varieties fare against each other under the same growing conditions, said onion industry consultant Bob Komoto.
“The real key of the OSU trial is that it’s a third party and not a seed company,” said Komoto, the retired manager of an onion shipper-packer operation in Ontario. “They do all the varieties for all the seed companies so you get an unbiased view of what’s happening. Anybody that wants to sell an onion here in the valley is going to have their onion in this trial.”
OSU’s Malheur County experiment station each year plants about four dozen of the main onion varieties grown in the Treasure Valley of Eastern Oregon and Southwestern Idaho, the nation’s top onion producing region by volume.
“They do a very good job of trialing all the varieties that ... are available for the Treasure Valley,” said Jon Watson, special projects manager for JC Watson Packing Co. “We’re looking for an onion that does well in the Treasure Valley and this trial gives us a good idea of how the different varieties grow on the ground here compared with each other.”
The field trial includes yellow, red and white varieties, which are grown under both furrow and drip irrigation. Each variety has a 23-foot-long plot and there are five replicates of each one.
Some of the onions are lifted from the field while others are still growing.
Researchers plant at a high seeding rate and thin the stand by hand so all the varieties have about the same plant population, said Erik Feibert, one of the project’s lead researchers.
“It costs a lot of money to do it that way but you get really good data,” he said. “All of the onions are grown under the same conditions in the same location in an unbiased way so industry can compare them.”
Bill Johnson said his farming operation plants one or two new onion varieties each year and the field trial helps him figure out what those varieties will be.
“There are a couple of varieties we haven’t grown before that I liked, some that had some really good consistency,” he said about this year’s trial.
How well the varieties store is also an important factor, he said, and the industry will be watching closely for the results when OSU researchers grade them for storability in January.
