Curly dock (Rumex crispus ) is a nitrate-accumulating, perennial broadleaf weed. It has narrow, dark green, hairless leaves with curly or wavy margins or wider leaves with smooth to finely ruffled margins. R. crispus is found virtually everywhere in the world, naturalized and in some places invasive.
R. crispus has a large, fleshy, yellow-orange colored taproot that extends deep into the soil, enabling them to survive drought periods and outcompete other vegetation. Small, greenish flowers in whorled clusters at the end of the upright stems appear early summer. It turns a rusty-brown color at maturity.
R. crispus is toxic to birds as it contains anthraquinones, oxalates and tannins.
- excess salivation
- sudden death
MECHANICAL CONTROL: mowing, digging, goat grazing
CHEMICAL CONTROL: Broadleaf herbicides such as 2,4-D or dicamba. Apply before flower elongation. Use glyphosate at early heading.
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