2024 Range & Pasture - Weed ID Guide

Annual Weeds

RAGWEED: COMMON and GIANT Ambrosia artermisiifolia L. and Ambrosia bidentada Life Cycle: Annual Plant Description: An erect, branching summer annual. 1 to 4 feet tall, has many lobed leaves. Flowers in late summer producing large amounts of wind-dispersed pollen.

Treatment: Apply 16 to 20 fluid ounces of DuraCor ® herbicide or 24 fluid ounces of NovaGraz ™

herbicide plus 1% MSO v/v per acre, or 1.2 to1.5 pints of GrazonNext ® HL herbicide per acre. Use lower rate when weeds are small and actively growing. Increase rate as season progresses and plants become more mature.

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