Yellow Nutsedge

This persistent perennial weed is considered one of the world's worst weeds. Yellow nutsedge (Cyperus esculentus) can be identified by its 3-ranked basal leaves, triangular stems, straw-colored seedheads, and round brown tubers at the ends of underground white rhizomes. Yellow nutsedge reproduces primarily by tubers.

Control: Handpull if the entire weed can be removed; otherwise, the underground tuber will produce a new set of leaves. Herbicides are available, but their selection depends on the particular crop. Application times vary according to the specific herbicide, ranging from early summer to early fall.