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Pest Information

Western Wild Cucumber

Western Wild Cucumber

  • Latin Name: Marah Oreganus
  • Common Name: Western Wild Cucumber
  • Other Names: Bigroot, manroot, old-man-in-the-ground

Pest Details

Western Wild Cucumber

Origin:

Native to the western United States and Canada.

Biology:

A perennial vine-like weed, with a huge taproot with a woody texture, that gives this weed one of its common names.

Identification:

Numerous stems come from the root, and these are long and thick as they twine over other plants or the soil. Leaves are on stalks and are up to 6 inches long and distinctly lobed, with a shiny, somewhat fleshy feel. Flowers are whitish and 5-petaled, somewhat star-shaped. The fruit is a gourd that reaches 3 or 4 inches in length. It is somewhat football shaped, beaked at the end, and becomes spiny as it matures.

Characteristicts Important to Control:

The huge size of the taproot must be taken into consideration when applying a post-emergent herbicide, and if physical removal is attempted this taproot must be removed as well.

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