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The 2022 Washington State University (WSU) Columbia Basin onion cultivar demonstration included 53 cultivars and lines from 7 different seed companies. It was planted in late-March in a center pivot irrigated field managed by Grigg Farms, located southeast of Quincy, Wash.
The trial design was a randomized complete block with three replicate plots for each cultivar. The trial was harvested in mid-September. Each plot was evaluated for yield (usable and culls) and size distribution (shown as weight per category and % of total bulb count in the report). Then, a subset of the bulbs was placed in storage.
In February, bulbs will be evaluated for firmness, scale retention, uniformity of shape, % single centers, and incidences of bacterial rot, neck rot, black mold, and internal defects such as double centers.
Click HERE to see the 2022 WSU onion cultivar demonstration report (yield and size distribution).
