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Pest Information

River Bulrush

River Bulrush

  • Latin Name: Scirpus Fluviatilis
  • Common Name: River Bulrush
  • Other Names: N/A

Pest Details

River Bulrush
River Bulrush

Origin:

Naturalized in the United States and found throughout temperate North America, as well as in much of Asia and into New Zealand.

Biology:

A perennial reproducing from seeds, but propagating aggressively with an extensive system of rhizomes, sometimes in chains of 2 or 3 together forming new shoots and clumps. Rhizomes are woody and very hard. Plants thrive in marshy habitats, along canals or drainage ditches and the banks of rivers or ponds.

Identification:

Mature plants grow up to 5 feet tall, with stems sharply triangular in cross section and with nearly flat sides. Several leaves grow alternate along the stem, and these are smooth, slender, and very long with a nodding habit. Flower heads form as very open and loose clusters at the ends of the stems, and below the clusters are from 3 to 5 short secondary leaves. The flower cluster is composed of a central cluster that is not stalked, and several other spikelets coming out from it on short stalks. These spikelets are composed of 5 to 10 flower groups that are up to 1 inch long and pointed.

Characteristicts Important to Control:

Aggressively growing perennials that are found in marshy or aquatic habitats. Growth is from thick, strong rhizomes, making physical removal unlikely to be successful.

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