Didymo discovered on the South Island, NZ
Since October 2004. the invasive alga Didymosphenia geminata (Didymo) has been found in the lower Waiau, Mararoa, Buller, Hawea, Upper Clutha, Von, Waitaki, Oreti and Upper Waiau Rivers. Its spread will seriously affect the health of South Island rivers and its trout fishery. The problem is considered so serious there is now discussion of closing spawning streams or tributaries to fishing access altogether to protect the future of the fishery.

A Controlled Area Notice has been issued for the whole of the South Island and its waterways. All locals and visitors are obliged to clean, wash and dry their gear according to the approved methods prescribed by Biosecurity when visiting ANY waterway on the South Island. Failure to "Check, Clean and Dry" between waterways could result in penalties of up to 5 years imprisonment, and/or a fine of up to $100,000. For the latest information click here.

1. Check: Before leaving the river, remove all obvious clumps of algae and look for hidden clumps. Leave them at the affected site. If you find any later, do not wash them down drains. Treat them with the approved cleaning methods below, dry them and put them in a rubbish bin.
2. Clean: Soak and scrub all items for at least one minute in either, hot (60°C) water, a two percent solution of household bleach or a five percent solution of salt, nappy cleaner, antiseptic hand cleaner or dishwashing detergent. A two percent solution is 200 ml, a five percent solution is 500 ml (two large cups), with water added to make 10 litres.
3. Dry: If cleaning is not practical (i.e. livestock), after the item is completely dry to touch, wait an additional 48 hours before contact or use in any other waterway.

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Canterbury Fly Fishing Club (CFFC)

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The club meets on the first Tuesday of the Month (Feb-Nov) at 7.30 pm in the Shirley Community Centre, 12 Shirley Road, Mairehau.

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