Biennial & Perennial Weeds
CURLYCUP GUMWEED Grindelia squarrosa Life Cycle: Biennial Plant Description:
Erect biennial or short-lived perennial 1 to 3 feet tall with pale branches.
Branches topped with bright yellow flowers supported by cups with small, sticky, curved bracts. Treatment: Apply 16 to 20 fluid ounces of DuraCor herbicide. The addition of 16 fluid
ounces or more of 2,4-D amine per acre will increase the speed of activity. 1.5 to 2.1 pints of GrazonNext ® HL herbicide per acre may also be applied. Apply to new growth and seedlings that have fully emerged but before bloom stage. Use lower rate when weeds are small and higher rate on larger plants.
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