Also known as:
Purple Nutsedge

General description

Erect perennial rush <50cm tall, extensive root system of tubers & bulbs. Dark green, grass-like leaves, prominent vein on underside. Reddish to purple-brown flowerhead (Jan-Mar) on upright, 3-sided stem.

Cropping land.

Mainly by cultivation equipment. Locally from rhizome & tuber growth.

Forms very dense colonies. Smothers other plants, & removes nutrients & moisture from soil. Rhizomes penetrate through vegetable crops, asphalt paths, plastic sheeting.

Site management

Follow spraying with replanting, either native species or pasture to prevent re-establishment. Pigs & poultry will also control well.

Recommended approaches

1. Most herbicides give only limited control
2. Mechanical cultivation removes as much root system as possible, breaks tuber chains.

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

RPMS status

Surveillance - Whole Region
nutgrass - Main species image