Definition of Russian thistle in US English:

Russian thistle


North American
  • A prickly tumbleweed that is an inland form of saltwort. Native to Eurasia, it was accidentally introduced into North America, where it has become a pest. Also called Russian tumbleweed.

    Salsola kali, family Chenopodiaceae

    • ‘The special disadvantages of invasive exotics were also becoming more obvious, as when harmful or useless cheatgrass, Russian thistle, and afilaria expanded across productive ranges once covered with succulent natives.’
    • ‘Species like Russian thistle and grasshoppers, as well as waterfowl came under the agency's purview.’
    • ‘In this parched landscape pads and roads heal slowly or not at all, and they are conduits for Russian thistle and other invasive aliens that replace native forage needed by wildlife.’
    • ‘Several weed species, including kochia, Russian thistle, and field sandbur are extremely drought tolerant.’
    • ‘Weed control for these treatments averaged from 80% to 100% on kochia and Russian thistle, 100% on tumble mustard and 98% on small seeded false flax weed.’
    • ‘When people stop buying gadgets and good-life knick-knacks, and instead choose to save money or, more likely, pay off their staggering debts, the whole economy shudders like a combine chewing on too much Russian thistle.’
    • ‘Many of the early emerging summer annuals, including giant ragweed, kochia, lambsquarters, and Russian thistle are removed during the tillage process, allowing the crop and any new weeds to emerge together.’
    • ‘Tumbleweeds, the dense Russian thistles accidentally introduced to the west, are ubiquitous.’
    • ‘Spartan herbicide has provided excellent control of troublesome broadleaf weeds, such as kochia, Russian thistle, and pigweed species in no-till sunflower research plots for the past several years.’
    • ‘Many early emerging summer annuals, including giant ragweed, kochia, crabgrass, lambsquarters, and Russian thistle, are removed during tillage, allowing the crop and any new weeds to emerge together.’
    • ‘State laws typically identified plants by common name as noxious: Russian thistles and milkweed, for example.’
    • ‘Disturbed or grassland habitats, which consisted of highly reflective bare ground or Russian thistle, had higher spectral values in the 1992 satellite image (current habitat) compared to more absorptive shrubland habitats.’
    • ‘Other species are burr ragweed, crown-leaf evening primrose, hairy bugseed, rush skeleton plant, and Russian thistle (a nonnative invader).’
    • ‘During winter, these finches eat seeds, especially Russian thistle, wild grass, mustard, and sunflower seeds.’