Around Dinan: do not pick knotweed to make pretty bouquets!
By Writing Dinan
Published on
Japanese knotweed is a rhizomatous plant that spreads out when it has no competing plant.
“If it’s in a garden, it doesn’t matter. If it is in nature, it is much more complicated to get rid of it, ”assures Mickaël Chevalier.
The plant is resistant to weedkillers
A farmer pointed out to him that this plant would proliferate in some of its plots.
“His concern was to see his plots invaded by these plants. He inquired about performance for his animals. He observed that, year after year, the plant covered more and more surface. He wondered why, despite the classic treatments, the plant resists”, specifies the mayor.
Classified as “super invasive”
Mickaël Chevalier realized that there is a large number of households in the municipality and that these hearths extend.
This plant is classified as super invasive (1). This rhizome plant runs 7 m around the hearth and reaches 3 m in depth. As soon as you touch it, you take the risk of multiplying the node of the vegetation. It’s the worst plant you can find
Stop its proliferation
Dinan agglomeration is working on writing a biodiversity atlas. Municipalities are invited to carry out actions towards this biodiversity.
Plumaugat of your choice take two actions. “We are going to continue the development of bocage hedges on the municipal territory and we are going to try to stop the proliferation of Japanese knotweed”, indicates Mickaël Chevalier.
Imported to feed horses
It is a plant that comes from Asia. She appeared at the end of the 19the. “It was imported to feed the horses and was poorly controlled”, specifies the mayor who created a commission made up of elected officials and farmers.
The only solution: weaken its development
We set ourselves two objectives: to make an exhaustive inventory of the hearths and we succeeded in counting about thirty hearths by making it possible to quantify the surface and to evaluate the risk of extension. And, depending on the risk, we will put in place techniques to either contain it or eradicate it, which will be complicated. »
currently, there is no chemical technique to destroy the plant.
The only possible solution so far is‘weaken the development of the rhizome.
Three methods
For this, three methods are possible.
Uprooting, but at 3 m depth it is not easy. Grazing with horses or goats. There is also the coverage of the infected surface, but we know that it takes more than 7 years to expect success from this device.
Japanese knotweed is a big problem.
“We have to be very careful when we do work and it develops, especially on the side of the roads. It is better to leave it, not to touch it, than to help it to proliferate on another site. For farmers, it is necessary to avoid using mechanical tools when you have a hearth in a plot. You have to ask people not to pick it to make a pretty bouquet in your house. It’s a plant that we shouldn’t touch anymore”, underlines Mickaël Chevalier who invites to locate the plant and report its presence At the mayor.
The message from the mayor of Plumaugat is not addressed not only to the inhabitants of his communebut to all those of the territory.
(1) Like witch’s claws, pampas grasses or ambrosia – Editor’s note.
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