Japanese knotweed cannot be cured, a major study which tried 19 methods over three years has found.
Researchers from Swansea University conducted the world’s biggest ever study into eradicating the invasive weed at two sites in Taff’s Well, near Cardiff, and in Swansea.
But despite using various chemical solutions, physical projects and a mixture of the two, the scientists found no definite ways of killing the plant completely using current methods.
Professor Dan Eastwood from the project said: “Basically, we’re discovering how best to tackle invasive plants in real world conditions, informed by evidence of what actually works. We began focusing on knotweed at a time when there was a great deal of hysteria surrounding it.
“At the time, most information for people affected by the plant was largely based on anecdote. This led to the prospect of unscrupulous companies offering expensive and ineffective treatment solutions.
“It was incredible to us that there was no long-term, large-scale field trial analysis of the treatment methods used to control Japanese knotweed.”
From the DT UK.
Here too, where telestra and others use herbicide on their sites, within 3 months everything has returned.
Why not just hand weed or whipper snip?
After a week of searing heat, light gentle rain fell most of the day. I enjoyed many hours and changes of wet clothes, to harvest the abundant cherry tomatoes. Today reducing them to tomato paste with a couple of bottles of chilli tomato sauce.
Lots growing in the garden that could be value added. Peppermint, dried into tea, bay leaves, tomatoes for drying, pineapples, for dehydrating, valerian, for tea, sage, thyme, mint, lemon grass, abundant and ideal for mulch.
In Peter Wohlleben’s inspiring book, THE HIDDEN LIFE OF TREES, he tells of the science in understanding how trees learn. It is now an accepted fact that a root network is in charge of all the chemical activity in a tree. Roots absorb substances and bring them into the tree. In the other direction, they deliver the products of photosynthesis to the tree’s fungal partners and even route warning signals to neighboring trees.
Strangler fig capturing a dead sally wattle.
In conjunction with his colleagues, Frantisek Baluska from the Institute of Cellular and Molecular Botany at the University of Bonn is of the opinion that brain-like structures can be found at the root tips. In addition to signalling pathways, there are also numerous systems and molecules similar to those found in animals. When a root feels its way to the ground, it is aware of stimuli. Researchers measured electrical signals that lead to changes in behaviour after they were processed in a “transition zone.” If a root encounters toxic substances, impenetrable stones or saturated soil, it analyzes the situation and transmits the necessary adjustments to the growing root. The root tip changes direction as a result of this communication and steers the root around the critical areas.
THE HIDDEN LIFE OF TREES is not only a meditation but a fact filled book. Read it and you will view a tree in a inspired way.
Byron Shire Chemical Free Landcare next fortnightly working bee will be on Saturday, the 26th of November, from 9am to 1pm, at Brunswick Heads Crown Land Reserve site. Meet at the end of South Beach Road fire track gate. We will be working on Glory lily follow up from the North (Dog walking beach access) to the South (Horse beach access) boundaries. If you come later, please call 0478272300 to find us.
Please wear boots, long sleeve shirt and long pants, a hat, gloves and bring water, rain coat and some morning tea. Tools and first aid kit will be provided.
BSCFL is a project of Mullum Seed
Mullumbimby Sustainability Education and Enterprise Development Incorporated
Jump-seed hand removal too on November 26. Want to join in a fun three hours while learning our ecology from the edge of the road ?
See where previous herbicide use has strengthen the regrowth as plants adapt to being poisoned.
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Peppermint ( mint. piperita ) grows well anywhere here and has to be contained by a serious slash and removal after each season. I now use it in an infusion following a wwoofer who stayed here earlier this year. He made a strong tea each day and sipped it before sleep. I had always thought it was more of a stimulant and ideal for upset stomach but it worked well as carminative.
An ideal companion for the cabbage family as it deters the white cabbage butterfly. I hope to try distilling it for its valuable oil. A deterrent to house mice.
Another successful day in follow up work in the third work zone in my regeneration project. Really is the most beautiful time of the year with the flush of new leaf growth on some of the emerging trees.
I hand removed lantana from this site ( below) in 1996.
Unexpected heavy rain. Feels more like our later wet season with the gauge over flowing by mid day. Just hope I have a break from another tree falling onto the incoming utility lines.
Another sign appeared at the turn off. All candidates running for Council positions are being asked to state their positions on Shire herbicide use.
Just intrigued at the grey hound debate in NSW.
Totally in support for exposing cruelty humans inflict on animals but with battery hen’s living conditions and the density of hens kept in the open here in NSW it just sounds like another popular response.
What is the difference?
Observe hens living in a natural environment and you will see that they are not as silly as most people think.
I planted Arrowroot a couple of years ago and no-one wanted it.
I remember is was a common ingredient, in powder form, in my Mother’s kitchen. It was preferred as a flour in thickening of soups ect. Easily digestible, it was used commonly in baby foods and as a diet product. I also remember it being a remedy for upset tummy.
Above is the so called Queensland Arrowroot, ( Cannaceae) a monocotyledonous plant, native to the West Indies and cultivated in tropical Queensland. Its starchy rhizomes are purple in colour and mature after 8 months of growth. They are used for extracting their starch and can be eaten as a vegetable.
I will try baking some soon with Garlic and olive oil.
Getting the whole body working again in lantana work is far preferable than sitting on a computer.
Two mornings past I have slashed lantana and water vines from a rosewood and a red cedar to discover a variety of seedlings beneath. Mainly rosewoods and bangalows. Its exciting to see. To transplant some of them is on the agenda this week.
The above photo is a red cedar which was a tiny transplant from beneath the parent tree below 18 months ago.
Life thriving in Zone 3 regeneration site.