Kent Ahrens

 Cyperus esculentus (Chufa Sedge, Yellow Nutsedge, Tigernut Sedge, Earthalmond) is a species of sedge native to warm temperate to subtropical regions of the Northern Hemisphere. It is an annual or perennial plant, growing to 90 cm tall, with solitary stems growing from a tuber. The stems are triangular in section, and bear slender leaves 3-10 mm wide. The flowers of the plant are distinctive, with a cluster of flat oval seeds surrounded by four hanging leaf-like bracts positioned 90 degrees from each other. The plant foliage is very tough and fibrous, and is often mistaken for a grass.

Nutsedge Control

From Landscape-America,

Control is difficult and should be started as soon as plants are discovered. One-shot weed control will not work, and multiple applications will be necessary. Traditional annual grass weed or broadleaf weed control products will not control yellow nutsedge. Specific herbicides are required for control. Herbicides are most effective on young, actively growing plants.

Nutsedge is difficult to control culturally because it produces numerous tubers that give rise to new plants. Pulling nutsedge often increases the number of plants because dormant tubers are activated. However, small stands of nutsedge can be controlled by persistent pulling. Pulling will eventually weaken the plants and cause them to die out.

Herbicides may be required when large patches of nutsedge are present in the turf area. For homeowners, a herbicide containing methanearsonate (this material may slightly discolor Kentucky bluegrass, but no serious injury should result if used at the rate and under the conditions described on the label). This is often sold under trades names like “Crabgrass Killer.” Consider the following steps in order to be successful in reducing the nutsedge contamination.

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If you are using the sleep feature, you do not need to turn off the PC each night. The majority of computers will use less than four watts of energy in overnight sleep mode and a little less than 2 watts if it is shutdown all the way. However, if you are taking an extended vacation, you may want to turn your computer off and also unplug the AC power adaptor. Even in off mode, most power adaptors will continue to draw around a half a watt of power.