Thousands of weed-munching weevils released to remove thick green carpet of water fern from Lancaster Canal
Weevils will be introduced to Lancaster Canal where they will banquet on the thick carpet of azolla covering its surface
Able to withstand British winters, water fern spreads like a sponge across the water and can double in area within a few days. This reduces light beneath the surface and shades out other native plants, as well as causing deoxygenation, leading to the death of fish.and boat dwellers have been told that the plant is not harmful to people or animals, but it can clog up the rudders and steering mechanisms of barges.
The plant is entirely free-floating and so able to grow in any depths, but the water must be still or slow moving for it to properly thrive. “As with all natural vegetation management, solutions are often not quick and easy,” the spokeswoman added.
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