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A winter annual, biennial, or short-lived perennial mustard with a 3 to 5 foot deep taproot. Basal rosette with bluish green leaves; stem leaves are lance shaped, alternate, and not stalked; all leaves have a cream-colored mid-vein. Small yellow flowers with 4 sepals, 4 petals, and 6 stamens.
|Soil and Moisture Conditions
|According to ODA, There are multiple historic sites scattered throughout Oregon that have been eradicated. Currently, Klamath and Lake Counties have the most infested acres.
|Hand pulling and digging after plant bolts but before seeds are produced, are recommended control options for difficult terrain. Active mowing will control orchard populations. It can be cultivated twice a year for control- once before seed prodcution and a second time in late fall.
|Reproduction and Spread
|Reproduces by seed; each plant can produce 350-500 seeds, some produce up to 10,000 seeds.
|Native to Russia, introduced to Utah from Ireland in 1910.
|other mustards, especially yellow or common mustard
|This allelopathic plant forms dense clolines in rangelands, damages crops, and destroys wildlife habitats.