How to Manage Pests

Pests in Gardens and Landscapes

Nutsedge rhizomes

Nutsedge rhizomes growing near potatoes may penetrate tubers. Tubers have brown streaks and what appears to be a root inside.

Identification

Solutions

Keep garden free of nutsedge. Nutsedge can be controlled if cultivated before plants have five to six leaves, the stage when they begin to produce tubers. Once tubers form, however, an infestation is extremely difficult to manage. Tillage is not effective because the tubers can survive up to 4 years in dry soil, and cultivation will only spread the infestation. The best approach in gardens is to keep removing small nutsedge plants as soon as you see them. Prior to planting, solarization or the herbicide glyphosate may reduce nutsedge populations somewhat.

Nutsedge rhizome inside potato tuber
Nutsedge rhizome inside potato tuber

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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