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Pest Information



  • Latin Name: Scleranthus Annuus
  • Common Name: Knawel
  • Other Names: German knotweed, German knotgrass

Pest Details



Introduced from Europe, and found throughout the eastern half of the United States and Canada, as well as in California and the Pacific Northwest.


An annual weed, preferring cooler climates, thus present in northern states in the summer and southern states in the winter. A common weed in turf and disturbed sites. Reproduction is from seeds.


This is a prostrate, sprawling plant with many branches, forming a mat over the soil as it grows. Stems are thin and flexible. Leaves are very narrow, opposite, and growing close together at the ends of stems to form bunches. They are sharply pointed at the tip and tend to bend downward. The small, green, inconspicuous flowers have no petals, and grow in small clusters within the leaf axils.

Characteristicts Important to Control:

In turf a selective broadleaf herbicide will effectively kill this weed. Prevention is effective with a pre-emergent herbicide.

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