Yellow Nutsedge Control

bentazon (Basagran, Bentazon 4)

Rate 0.75 to 1 lb ai/a

Time Apply when yellow nutsedge is 6 to 8 inches tall and, if needed, again at the same rate 7 to 10 days later.

Remarks Results are best with two applications. Add oil concentrate to spray mix as label instructs. Refer to this product in Postemergence section above for additional remarks and cautions.

Site of action Group 6: photosystem II inhibitor

Chemical family Benzothiadiazole

halosulfuron (Sandea)

Rate 0.0314 to 0.0623 oz ai/a (0.67 to 1.33 oz/a product)

Time Apply to yellow nutsedge that is at three- to five-leaf stage.

Remarks Add 1 to 2 quarts nonionic surfactant or crop oil concentrate per 100 gal spray solution for broadcast applications. A second application may be required 6 to 10 weeks after the first.

Site of action Group 2: Acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

halosulfuron + dicamba (Yukon)

Rate 0.75 to 1 oz/a halosulfuron + 3.3 to 4.4 oz/a dicamba (6 to 8 oz product/a)

Time Apply when corn is 1 to 12 inches tall and yellow nutsedge is at the 3- to 5-leaf stage.

Remarks Add 1 to 2 quarts nonionic surfactant or crop oil concentrate per 100 gal spray solution for broadcast applications. A second application may be required 6 to 10 weeks after the first.

Site of action (halosulfuron) Group 2: Acetolactate synthase (ALS) inhibitor; (dicamba) Group 4: synthetic auxin

Chemical family (halosulfuron) Sulfonylurea; (dicamba) Benzoic acid

mesotrione (Callisto)

Rate 0.078 to 0.094 lb ai/a (2.5 to 3 fl oz/a product)

Time Apply postemergence to corn less than 5 inches tall.

Remarks Suppresses nutsedge growth.

Site of action Group 27: inhibits 4-hydroxyphenylpyruvatedioxygenase (4-HPPD)

Chemical family Triketone