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I believe that many friends in rural areas should see knotweed.
Some people even often eat knotweed as a snack, which tastes sour, crunchy, refreshing and delicious.
Dachuan searched on the Internet, and now knotweed has become a "rare thing", and the knotweed on the Internet can easily cost more than ten yuan a catty, and the expensive one can even be sold for 39 yuan a catty!
However, to everyone's surprise, it is such a delicacy in the world, such a "rare thing", but it is flooded in the UK.
The British were cornered, and the British government spent billions to eliminate them.
What's going on here?
A nightmare for the British
Knotweed is truly a nightmare for the British.
In 2014, there was a serious criminal case in the UK.
After the police intervened in the investigation, a suicide note was found.
The suicide note was left by Kenneth, a 52-year-old man who created the case.
In his suicide note, Kenneth said that he suffered from severe anxiety disorders because he feared that his house would be invaded by knotweed. Later, after discovering that the neighbor's knotweed had invaded his yard, he had a complete mental breakdown. So, the decision was made to kill his wife and commit suicide.
Facts also proved that Kenneth did this, first taking advantage of his wife's inattention, he hit his wife in the back of the head with a perfume bottle, killing her with a blow, and then chose to commit suicide.
Speaking of which, it's not for nothing that Kenneth is so anxious about Knotweed's invasion of the house.
In the UK, house prices plummeting whenever a house is invaded by knotweed.
There was a British couple who had just bought a new house worth $474,000 when they found that the house had been invaded by knotweed, and the value of the house plummeted by 80%.
What's more, even if they sell at such a price, no one wants to ......
Japanese knotweed invading the British
Originally, there was no knotweed in the UK.
The first knotweed in Britain was introduced from Japan by a German physician named Philipp Franz von Siebold, in the 50s of the 19th century.
Back in the 50s of the 19th century, when Philip went to Japan to study and exchange, he accidentally found a tenacious and beautiful plant near a volcano, which was actually knotweed.
Since Philip likes to collect exotic flowers and plants from all over the world, he brought this knotweed back.
Later, he saw that Knotweed was not included in Kew Gardens, so he simply gave Knotweed to Kew Gardens with great generosity and generosity, and gave it to Kew Gardens that he had worked so hard to get from Japan.
In Kew Gardens, knotweed grows very fast, and can grow very high, leafy, and does not need to be deliberately cared for, very easy to cultivate.
Based on this, it didn't take long for knotweed to be "Amway" from the botanical garden to thousands of households, and became an excellent plant for shade and greening raised by every household.
Until this point, no one was aware of the dangers of knotweed.
However, once they realized the dangers of knotweed, the British realized that it was already too late, and that the invasion of knotweed against Britain was too serious to eradicate them.
The dangers of knotweed flooding
The knotweed that invaded Britain was extremely tenacious.
They must be removed by root, otherwise a little bit of the stump will grow back into a new knotweed in the near future.
However, their roots are often so deep that it is impossible to dig them out completely.
More importantly, the proliferation of knotweed poses a huge threat to local infrastructure, residents' houses, etc.
Knotweed is so tenacious that they can take root almost anywhere and break through the ground from almost anywhere.
Some residents can even arch a knotweed under the floor of their home.
The existence of these knotweeds has also made the originally sturdy buildings no longer strong.
Based on this, when many British people buy a house, the first thing they consider is whether the house has been invaded by knotweed, and the house that has been invaded by knotweed, even if the price is low, they do not dare to buy it, for fear that the house is not strong enough.
Naturally, the British government will not sit idly by in response to the spread of knotweed in Japan, but the problem is that no matter how much money the government invests to eradicate knotweed, it has not been able to completely eradicate them.
In 2014 alone, the UK spent £1.25 billion on cleaning knotweed, and the total cost of cleaning knotweed over the years is even more incalculable.
But the reality is that the effect is not ideal, and knotweed is still rampant.
Why isn't the continental knotweed overflowing?
Many people may wonder why knotweed is not only not flooded in the mainland, but still needs to be planted in large quantities to meet our needs.
The reason is actually very simple, the continent is vast, the biological chain is very perfect, and knotweed has a large number of natural enemies in the mainland, such as the most typical psyllid, they will lie on the knotweed and suck a lot of knotweed juice to inhibit the growth of knotweed.
In order to increase the yield of knotweed, many growers even have to find ways to clean up these "pests......
Speaking of which, Britain has also learned wisely over the years, and began to introduce psyllids and other creatures to restrain knotweed.
Although the British government has spent more than 2 billion pounds on this project, the effect is very significant, hundreds of thousands of psyllids have indeed effectively restrained the growth of knotweed in most parts of the UK.
Speaking of which, this is probably the so-called "one thing to one thing......