Didymo has continued to spread through the South Island. Although at this stage it has [u:32xymven]not[/u:32xymven] spread to many of our best back country rivers and lakes. Advice from Fish and Game and Biosecurity New Zealand is for anglers and other users
Didymo was discovered in Nelson’s Takaka River near the end of December 2006. This is as far north that it has been found so far. However, in a recent development scientists have discoved that copper kills Didymo almost instantly. They are conducting promising trials at the moment in Southland.
I had a report from a bloke who managed to hook and land a salmon from a jet boat in the lower Waitaki River just before the season closed. He reakons he had to get his mate to pull off the Didymo from his rod tip while he was trying to play the fish. He says it is horrid ****** stuff. It also clogs the treble hooks on your zeddie so you end up with a foot long tail of rock snot on the hook which can’t be very inviting for a salmon to strike at!
While didymo is a nusance and is disdusting to look at it doesnt adversly effect the fishery [though it is no help to the anglers], so far I have found this to be true.
It still looks like **** though
Edit: apparently didymo isn’t much of a problem in lakes, it usualy only make a thin surface layer, but in the worst places in rivers it tend to form chunks that float downstream, and form a big thick carpet on the bottom of the river bed with strands coming off of it every now and again