Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search


Public support needed to keep water free of banned weeds

5 May 2014

Public support needed to keep water free of banned weeds

The Ministry for Primary Industries (MPI) and Auckland Council are asking residents to report any fresh sightings of two banned and highly destructive weeds - water hyacinth and salvinia.

Both weeds are present in the Auckland region and are known for growing rapidly to form large dense floating mats on ponds, drains, lakes and still waters in swamps.

“Water hyacinth and salvinia are among the world’s worst weeds,” says MPI Response Manager Emmanuel Yamoah.

Both plants grow very quickly. Water hyacinth is able to double its population size in as little as 12 days, while salvinia only needs about a week.

“These weeds have the potential to cause huge damage to our waterways, native aquatic plants and fish. They can clog waterways, making almost all water activities impossible and increasing the danger of drowning to humans and livestock. The weeds also have adverse impacts on hydro-electricity generation and irrigation.”

Dr Yamoah says MPI and the Auckland Council have an eradication programme in place for water hyacinth and salvinia.

“We need to know where these weeds are so we can wipe them out, so the assistance of the general public is crucial to the success of the eradication programme.”

He says many home and farm ponds around Auckland have been cleared of the noxious weeds, thanks to calls from concerned owners and residents.

“Anyone who sees any of these weeds, or suspects they may be present, should report it to us on 0800 80 99 66. MPI contractors will visit the site and remove the weeds free of charge if they find them.”

It is illegal under the Biosecurity Act 1993 to share, grow or sell unwanted and notifiable organisms.

Background information about salvinia and water hyacinth
Salvinia is a small, free-floating aquatic fern with branched, horizontal stems that lie just below the water surface. The upper surface of the leaf is covered with distinct white hairs. It has a root-like structure underneath each leaf pair and as the plant matures, these ‘roots’ resemble wet hair. The plant grows usually up to 30cm long.

Water hyacinth is a floating aquatic perennial, with distinctive bladder-like swollen leaf petioles giving buoyancy. It has shiny rounded leaves with thick masses of feathery dark roots that can reach 2.5m in length. A single flowering stalk with a cluster of mauve-blue flowers, each with a yellow spot, is produced above the foliage. Plants produce floating horizontal stems from which new plants arise.

Water hyacinth was first declared as a Class A noxious weed in 1981 under the Noxious Plants Act. Salvina was first declared in 1983.

Visit www.biosecurity.govt.nz/pests/salvinia for more information.


© Scoop Media

Parliament Headlines | Politics Headlines | Regional Headlines



Australia Deportations: English Relaxed On Immigration Centre Conditions

Labour's Annette King: “There have been numerous reports from inside these detention centres on just how bad conditions are... If they were being held in any other foreign jail, I imagine Mr English would be somewhat concerned. More>>


Schools: Achievement-Based Funding Would Be A Disaster

The Education Minister’s speech to the PPTA Conference raising the spectre of achievement data driving a new funding system would be disastrous, says NZEI Te Riu Roa. More>>

  • Video Out-Link - PPTA Annual Conference 2015 on Livestream (Q+A dicussion suggests funding would be directed to less successful schools.)

  • ALSO:

    ECE Report:

    Key In NY: Prime Minister Addresses United Nations

    Prime Minister John Key has addressed the United Nations General Assembly in New York, focusing on a call for action in Syria and on other conflicts, reform of the veto process and on the UN’s Sustainable Development Goals. More>>.


    Gordon Campbell: On The Lack Of Accountability Over Philip Smith

    In New Zealand, accountability is an exotic creature rarely glimpsed at ministerial level, or among senior management. The flight to Rio by the paedophile /murderer Philip John Smith/Traynor is no exception. More>>


    More On Corrections

    Gordon Campbell: On Putin’s Diplomatic Coup Over Syria

    There’s a simple historical precedent for what is occurring in Syria. During WWII, the Allies joined forces with a known butcher and tyrant – Joseph Stalin of the Soviet Union – in order to defeat a greater evil, Nazi Germany… More>>


    Key 'Didn't Know': Brownlee Seeks Pandas In China

    While Defence Minister Gerry Brownlee is in China pushing a taxpayer funded deal to bring two pandas to New Zealand, the country’s military look set to be hit with a pay freeze, Opposition Leader Andrew Little says. More>>


    Scoop Business: GCSB Willing To Extend Cyber-Attack Programme To Local ISPs

    The Government Communications Security Bureau’s ‘Cortex’ cyber-security programme has been successful in helping identify and mitigate a series of cyber attacks since its introduction and an extension to cover local internet service providers is still on the cards... More>>


    Get More From Scoop



    Search Scoop  
    Powered by Vodafone
    NZ independent news