How to kill noogoora burr

Access all the information needed for control of this noxious weed, including weed identification, herbicide application and spray timings.


Description

Noogoora burr description

Description

Noogoora burr is a short-lived, usually annual, shrub that is often abundant after spring and summer floods. It typically grows to around 1 m but may grow to around 2.5 m under ideal conditions and in the absence of a commonly-occurring leaf and stem rust and stem-boring and stem-galling insects.

The stems of the plant are rough to the touch, and feature short bristly hairs along its length. The leaves are usually a darker green towards the tips, and get paler as they get closer to the stalk. The leaves are covered in small bristles and are coarsely toothed around the edges, with three prominent reddish veins extending to each of the three lobes.

The burrs themselves grow typically to around 7–25 mm long and are covered in hooked spines.

Each burr contains two seeds. Seedlings are poisonous to stock and may cause losses if eaten in sufficient quantities, and the burrs are a costly contaminant in wool. Noogoora burr is a significant competitor in pastures and can be a serious weed in summer crops.

Weed control

Controlling noogoora burr

When the infestation is small, noogoora burr can be removed by hand, ensuring the entire taproot is removed and disposed of by burning to prevent regrowth. Cultivation can be effective as long as it is performed before flowering.

For more extensive we recommend the use of Starane Advanced as a foliar spray at a rate of 0.45 mL/1 L of water.

Herbicides for control of noogoora burr

Product#Method of applicationRate*State
Starane® Advanced Herbicide Foliar spray 45 mL/100 L of water All
Stinger® Herbicide Foliar spray 14 g/100 L of water + surfactant NSW
Fallowboss TORDON® Herbicide Boom application 1 L/ha NSW, Qld
       
       

# Note: Preferred product option in bold.  * Consult label for details of growth stage and use, especially where range of rates is given.

Treatment timing

Timing to kill noogoora burr

For best results spray when plants are actively growing and ensure thorough coverage of all foliage and stems.

ProductSepOctNovDecJanFebMarAprMayJunJulAug
Starane® Advanced Herbicide
Key: Best time to spray/treat Can spray/treat if conditions are suitable Do not spray/treat
Woody Weed Specialist