Fly Fishing Forums


Go Back   Fly Fishing Forums > General Fly Fishing Forums > Conservation and Fishery Restoration
Forums Register Blogs FAQ Members List Social Groups Calendar Search Today's Posts Mark Forums Read

Like Tree6Likes

Reply
 
Share LinkBack Thread Tools Display Modes
  #1  
Old 08-06-2017, 02:15 PM
johhwu's Avatar
Member
 
Join Date: Mar 2015
Posts: 82
johhwu is on a distinguished road
Default Canadian pondweed and Curly leaf removal

Currently working at a fishery that is having a big problem with Canadian pondweed and Curly leaf pondweed, it is growing at a rapid rate due to the clarity of the water. I have been manually removing the weed with a cutter and a rake, but it is a very large job when it is only me on the lake (I occasionally have help but it seems to be a losing battle). Any suggestions on other ways to tackle this? Ive looked into getting someone in but the machine only cuts to 5ft deep, and it would grow back up in a matter of weeks. Also looked into herbicides but seems most like Diquat etc are banned in the UK.

Any suggestions would be helpful
Reply With Quote
  #2  
Old 08-06-2017, 02:35 PM
Member
 
Join Date: Mar 2008
Location: on the banks of the A5
Posts: 268
glueman is on a distinguished road
Default Re: Canadian pondweed and Curly leaf removal

With DEFRA approval it may be possible to use Roundup
fredaevans likes this.
Reply With Quote
  #3  
Old 08-06-2017, 02:37 PM
johhwu's Avatar
Member
 
Join Date: Mar 2015
Posts: 82
johhwu is on a distinguished road
Default Re: Canadian pondweed and Curly leaf removal

Quote:
Originally Posted by glueman View Post
With DEFRA approval it may be possible to use Roundup
And that can be put in the water without harming the fish, inverts etc?
Reply With Quote
  #4  
Old 08-06-2017, 03:32 PM
Member
 
Join Date: May 2016
Location: Sheffield
Posts: 4,032
bumble54 will become famous soon enough
Default Re: Canadian pondweed and Curly leaf removal

Cutting Canadian pond weed invariably makes things worse as every stray piece that settles in shallow enough water will root. At other times of year it becomes brittle and then it spreads of it's own accord. The best method is grubbing out the roots early and late season, tough job.
Reply With Quote
  #5  
Old 08-06-2017, 03:41 PM
johhwu's Avatar
Member
 
Join Date: Mar 2015
Posts: 82
johhwu is on a distinguished road
Default Re: Canadian pondweed and Curly leaf removal

Quote:
Originally Posted by bumble54 View Post
Cutting Canadian pond weed invariably makes things worse as every stray piece that settles in shallow enough water will root. At other times of year it becomes brittle and then it spreads of it's own accord. The best method is grubbing out the roots early and late season, tough job.
We have been trying to get it from the roots. We made a rake from steel that basically trolls the bottom, but it is very very heavy, and when the weeds start to wrap it its near impossible to lift out (we drop in in and drag it back from the bank). So with the big V cutter we were also trolling, its the same sort of story, and as we are rowing with oars its a hard oul job lol. Just wish there was some herbicide that we could use, or some magical method, but from research it seems that just gotta pull it out by hand.
Reply With Quote
  #6  
Old 08-06-2017, 07:02 PM
Member
 
Join Date: May 2016
Location: Sheffield
Posts: 4,032
bumble54 will become famous soon enough
Default Re: Canadian pondweed and Curly leaf removal

Fraid so. If there is vehicle access?, has anyone got a landrover, preferably with a winch to attach the rake chain to.
Reply With Quote
  #7  
Old 08-06-2017, 07:06 PM
sewinbasher's Avatar
Member

 
Join Date: May 2006
Location: North East Wales
Posts: 10,344
Blog Entries: 2
sewinbasher has a reputation beyond reputesewinbasher has a reputation beyond reputesewinbasher has a reputation beyond reputesewinbasher has a reputation beyond reputesewinbasher has a reputation beyond reputesewinbasher has a reputation beyond repute
Default Re: Canadian pondweed and Curly leaf removal

We have a 3 acre clear water pool with similar issues. We used to cut it which was done with mechanical weed cutters and easy enough but the real issue was dragging out and disposing of the cut weed which for an ageing membership was too demanding. We now use permitted chemical treatment, including most recently RoundUp, which are fairly effective but every time we find something that works it gets banned, and I think this now includes RoundUp. We're currently trying a dye that inhibits light and thus retards growth.

You shouldn't try to eradicate it as it has huge food harbouring qualities, just keep it 3 or 4 feet sub surface or clear patches.
__________________
“There is no more lovely country than Monmouthshire in early spring. Nowhere do the larks sing quite so passionately, as if somehow inspired by the Welsh themselves. There is a blackbird on every thorn and a cock chaffinch, a twink as they call him there, on every bush...... It moved me profoundly. I had been spared to see another spring, and I thank God for it.”

Oliver Kite
“A Spring Day on the Usk”
A Fisherman’s Diary

Last edited by sewinbasher; 08-06-2017 at 07:08 PM.
Reply With Quote
  #8  
Old 08-06-2017, 07:19 PM
Member
 
Join Date: May 2016
Location: Sheffield
Posts: 4,032
bumble54 will become famous soon enough
Default Re: Canadian pondweed and Curly leaf removal

[QUOTE=sewinbasher;2239793] We're currently trying a dye that inhibits light and thus retards growth.

I do hope you've had professional advice, these dyes can do the job but have the potential to cause massive algae die off with drastic effects of oxygen depletion.
Reply With Quote
  #9  
Old 08-06-2017, 07:31 PM
johhwu's Avatar
Member
 
Join Date: Mar 2015
Posts: 82
johhwu is on a distinguished road
Default Re: Canadian pondweed and Curly leaf removal

You shouldn't try to eradicate it as it has huge food harbouring qualities, just keep it 3 or 4 feet sub surface or clear patches.[/QUOTE]

Yea don't want a bare basin, but its right up to the surface in some parts so it needs to be controlled to an extent, or it will end up unfishable.

There is vehicles access yes and I think ill try the winching idea thanks!
bumble54 likes this.
Reply With Quote
  #10  
Old 08-06-2017, 08:54 PM
sewinbasher's Avatar
Member

 
Join Date: May 2006
Location: North East Wales
Posts: 10,344
Blog Entries: 2
sewinbasher has a reputation beyond reputesewinbasher has a reputation beyond reputesewinbasher has a reputation beyond reputesewinbasher has a reputation beyond reputesewinbasher has a reputation beyond reputesewinbasher has a reputation beyond repute
Default Re: Canadian pondweed and Curly leaf removal

[quote=bumble54;2239803]
Quote:
Originally Posted by sewinbasher View Post
We're currently trying a dye that inhibits light and thus retards growth.

I do hope you've had professional advice, these dyes can do the job but have the potential to cause massive algae die off with drastic effects of oxygen depletion.
We're fortunate enough to have a former EA fisheries scientist in the club as advisor and have not suffered any unfortunate side effects. We have also been using a solar powered sonic "algae buster" to control the algal blooms for 5 or 6 years now.
bumble54 likes this.
__________________
“There is no more lovely country than Monmouthshire in early spring. Nowhere do the larks sing quite so passionately, as if somehow inspired by the Welsh themselves. There is a blackbird on every thorn and a cock chaffinch, a twink as they call him there, on every bush...... It moved me profoundly. I had been spared to see another spring, and I thank God for it.”

Oliver Kite
“A Spring Day on the Usk”
A Fisherman’s Diary
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Curly's Buzzer MigdaleGal Fly Tying Forum 8 26-03-2015 08:40 PM
curly bums 3lbgrayling Trout and Grayling Fishing 15 30-08-2014 05:47 PM
Curly bum hatch geo4316 Trout and Grayling Fishing 7 08-08-2014 06:21 PM
curly line ?? kevspread General Fly Fishing Discussion 8 20-10-2009 09:44 PM
Curly II curlyII General Fly Fishing Discussion 2 11-07-2008 02:32 PM















All times are GMT. The time now is 11:58 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.1
2006-2017 Fish&Fly Ltd