Saffron thistle

Saffron thistle (Carthamus lanatus) is a native of the Mediterranean region and was first recorded in New Zealand in 1931. Accidentally introduced as a contaminant in wheat from Australia, Saffron thistle has become established at sites in Gisborne, Hawkes Bay, Horowhenua, Wairarapa, Nelson and Christchurch. Saffron thistle is an erect rigid annual which usually grows to a height of 1m. If allowed to become established it can form dense stands which restrict stock movement and compete with pasture species, thus reducing the stock-carrying capacity. Injury to the eyes and mouths of grazing animals may occur, and damage to fleeces may also result. If allowed to become established in a cropping situation it has the potential to greatly reduce yields.

Saffron thistle is a pest plant of pastoral and cropping lands and has the ability to colonise a range of localities. Widespread infestations of this plant would impact greatly on the region's agricultural industry.

	Saffron thistle

To ensure that all known sites of saffron thistle are totally controlled, with a view to eventual eradication from the region.

Report sites of saffron thistle to Greater Wellington. It is illegal to sell, propagate, or distribute any parts of these eradication pest plants in the Greater Wellington region.

Greater Wellington will arrange control of saffron thistle on your property, at no cost to you.

For more information or advice about pest plants, contact Greater Wellington's Biosecurity staff on 06 378 2484 or 04 526 5325 or email pest.plants@gw.govt.nz