![Alien aquatic plants](https://magarticles.magzter.com/articles/11201/402186/5e1e6d86c5351/Alien-aquatic-plants.jpg)
Australian swamp stonecrop
(Crassula helmsii)
Description
The plant has round stems, fleshy leaves and flowers that are small and white with four petals.
Introduction and spread
Brought to the UK from Tasmania in 1911 as an oxygenating plant for ponds and aquaria. It was first reported in the wild in Essex in the 1950s, and has now spread throughout much of England, and is still spreading.
Risk analysis
With a vigorous growth habit, a tolerance of a wide range of pH and salinity, the ability to grow from tiny plant fragments, and capable of colonising mud as well as water, this is a robust and competitive alien plant. It forms dense mats of vegetation that suppress native aquatic plants and restrict water flow, leading to land drainage and flood management problems.
Control
Listed under Schedule 9 of the Wildlife and Countryside Act 1981, it is an offence to plant or allow the species to grow in the wild. It can be controlled by shading and controlled chemical spraying, and visitors to sites known to hold the species should follow the ‘Check, Clean, Dry’ procedure advised by www.nonnativespecies.org
Water primrose
(Ludwigia grandiflora)
Description
Fleshy stems with dark green leaves, the plant emerges and forms distinctive bright yellow flowers, spreading out from the banks of stillwaters, canals or slow-moving rivers via fragmentation and seeds.
Introduction and spread
Native to South America, the plant was introduced to the UK for the ornamental aquatic trade, and escapee colonies have been identified in a limited number of locations, primarily in the southern counties of England, although it has already been successfully eradicated from some of them.
Risk analysis
Denne historien er fra January 14, 2020-utgaven av Angler's Mail.
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Denne historien er fra January 14, 2020-utgaven av Angler's Mail.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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Making Short Work Of Specimen Chub
It takes angling guide Kenny Parsons a few hours to drive from his home, near Bath, to his favourite Wessex rivers, but it doesn’t seem to bother him, as he just loves to catch big chub on feeder and fl oat tactics, his personal best standing at 7 lb 12 oz. One of his favourite methods for this cunning species is a maggot feeder with a short hook link.
![Venues on the menu](https://reseuro.magzter.com/100x125/articles/11201/402186/5e1e697c64ec3/crp_Venues-on-the-menu.jpg)
Venues on the menu
Dave regularly switches between different types of venue, as he is convinced that it helps him become a better and far more versatile angler. Here is his guide on what to expect and how to tackle them.
![“By failing to prepare, you are preparing to fail”](https://reseuro.magzter.com/100x125/articles/11201/402186/5e1e414c49a3a/crp_By-failing-to-prepare-you-are-preparing-to-fail.jpg)
“By failing to prepare, you are preparing to fail”
In our new mini series, the physiotherapist will put you in the right frame of mind to help you achieve your angling dreams.
Search for a super stripy
They’ve done it! Robbie Northman and John Bailey have been on a long mission to catch a 4 lb perch. Robbie got there first, landing this specimen recently.
Pole position carping
The thinking carp angler offers his opinion, insight and advice every week exclusively here in Angler’s Mail. Col will help you become a wiser angler.
![My best catch!](https://reseuro.magzter.com/100x125/articles/11201/402186/5e1e69dd93c21/crp_My-best-catch.jpg)
My best catch!
This week: Billy puts his newborn daughter on the scales after a productive winter carp session.
![Huge zed after run of disasters](https://reseuro.magzter.com/100x125/articles/11201/402186/5e1e3d12d9b1a/crp_Huge-zed-after-run-of-disasters.jpg)
Huge zed after run of disasters
19 lb 4 oz monster zanderRiver boat fishing sessionSeries of calamities
![Christmas stocking](https://reseuro.magzter.com/100x125/articles/11201/402186/5e1e40686281b/crp_Christmas-stocking.jpg)
Christmas stocking
The future of fishery management is a bright one, these BTEC Fish Husbandry students keen to help stock an Essex lake with carp over the Christmas holiday, including this 21 lb mirror.
![Alien aquatic plants](https://reseuro.magzter.com/100x125/articles/11201/402186/5e1e6d86c5351/crp_Alien-aquatic-plants.jpg)
Alien aquatic plants
In this final part of my special look at alien species, I have highlighted some invasive aquatic plants that have had an impact on waters, with an evaluation on the degree of threat that they pose, on a scale of one to ten, one being the lowest.
A guide's guide to guides
Canadian Jeff is a great guide, helping anglers to catch the fish of their dreams.