Help stop the summer spread of Parthenium weed

February 9, 2022

The call is out for landholders to keep an eye out for the invasive Parthenium weed, which was discovered on three properties in Gunnedah Shire last year.

Gunnedah Shire Council Biosecurity Officer Lee Amidy said Parthenium weed was one of Queensland’s worst weeds and had the potential to become established in New South Wales.

“Parthenium weed has been discovered growing in roadside situations in past years,” Mr Amidy said, “however, last year was the first time it’s been found on private property .

“It is a quick-growing weed that spreads rapidly and causes health problems for both people and livestock. Parthenium produces seeds continuously over the summer season, and can produce up to 15,000 seeds a year. It is spread on harvesting machinery, grain and vehicles.

“We are asking people to keep an eye out for this weed, but not to remove it themselves. It can cause respiratory problems and dermatitis. If you suspect your property has an infestation, you are required under the Biosecurity Act to notify Gunnedah Shire Council.

“High-risk sites for Parthenium include places with disturbed, degraded or bare soil, such as over-grazed areas, stockyards and watering points, neglected areas and roadsides.”

Parthenium weed is classified as a Weed of National Significance. It grows 1-1.5m tall, but can grow to 2m tall, with pale green leaves, soft fine hair on stems, creamy white flowers that are 4-6mm in diameter that are star-shaped with five points. Remember not to touch the weed. Severe allergies can develop after a few exposures.

Parthenium weed is often confused with: • annual ragweed (this has round stems whereas Parthenium has ridged or grooved stems) • Farmers Friend/Sticky Beak(this has individual leaflets whereas the leaves of Parthenium are deeply divided) • bishop’s weed (this has larger, distinct petals) • hemlock (also has larger, distinct petals).

If you believe you have Parthenium weed on your property, please call Gunnedah Shire Council on 6740 2100.

Caption: Gunnedah Shire Council is asking people to keep an eye out for the invasive Parthenium weed.

ENDS

Media and communications team contact: (02) 6740 2100.