Annual Weeds
MARSHELDER or SUMPWEED, SULPHURWEED Iva annua Life Cycle: Annual Plant Description:
Robust, branching stems with greenish- white flowers at the top grow 2 to 10 feet tall. Leaves grow opposite one another with long petioles. Flowers are stalkless and crowded on long, branching spikes at the tops of stems with rough (sandpaper) texture. herbicide per acre on plants less than 4 inches tall. Taller, more mature plants require 20 fluid ounces of DuraCor herbicide per acre with 1% MSO per volume of water used. Once the plant branches, do not treat.
Treatment: Add 16 fluid ounces of DuraCor ®
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