Help needed to spot a spiky pest

The hunt for an invasive needle grass is on, as the pest plant flowers over spring and summer.

Chilean Needle Grass is a South American weed that invades dryland pastures, and its sharp seeds cause blindness and deafness in animals, and abscesses in sheep.

The weed was first discovered in Marlborough in the 1940s and has become an invasive pest, travelling across the region on sheep’s wool, machinery and in clothing.

Marlborough District Council senior biosecurity officer Liam Falconer said the needle grass was easier to spot in spring and summer, when it flowers.

‘‘Look out for its purpletinged, spiky seed heads and its lime green colour. It is a sharp, angular grass, not soft or droopy like most other grasses,’’ Falconer said.

Council staff and contractors will be carrying out control work and compliance inspections in areas known to be infested by the needle grass, but Falconer said members of the public could help to identify the plant and avoid spreading it.

‘‘Everyone can help by being aware of the risk posed by the grass and being alert to its presence.

‘‘At this time of year the seeds can easily hitch a ride, especially if people are moving soil, machinery and stock. If you’re in an infested area it’s important to be aware of the risk and the regulations that apply.’’

Owners of lifestyle blocks, farms and vineyards should check their property for infestations, and contact the council if they found any sign of the grass, as there was support available to control the plant in new areas.

‘‘Chilean Needle Grass seeds spread easily as they cling to footwear and animal pelts. People walking in already affected areas can help ensure they’re not carrying seeds by checking their footwear and their dog’s coat.’’

People who think they have found Chilean Needle Grass should take a photo of it, record the location and email the council at: biosecurity@marlborough.govt. nz.

A Smart Map was available on the council website with information on the status of the pest plant, where it has been found, photographs, and explanations of what can be done to deal with it.

GEOFF VAUSE/ STUFF Fiona Thomson on the hunt for Chilean Needle Grass with a sniffer dog in 2017.