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Text: Jiang Qingtong
Editor|Jiang Qingtong
Introduction:
Biological invasion of many countries is like a "nightmare", after they enter the territory, they will not only reproduce in large quantities, but also harm the crops of various countries, causing serious impact on the local ecological environment.
Among them, Japanese knotweed is the most seriously invaded, and some countries have spent 6.3 billion yuan to eliminate it, and it is precisely because of its invasion that it has brought huge losses to the local economy.
However, this creature, which is extremely feared by many countries, has been planted in large quantities on the mainland, and this contrast has puzzled many people.
So why is China growing Japanese knotweed in large quantities? What is the use of it?
Wary! Japanese knotweed invasion
Biological invasion refers to the plant that grows in a specific area and relies on human or animal contact to transmit it to another new area for rooting and germinating, which is called biological invasion, which will have a certain impact on forestry and animal husbandry.
First of all, one of the main causes of biological invasion is the introduction of seeds, although this method is very common and also gives plants a chance to grow in other areas, but the slightest carelessness will cause the organisms to gradually spread in the surrounding area, so that they cannot be controlled.
The right introduction can enrich people's lives, and the wrong life will harm people's lives, for example, a tourist in the United Kingdom once brought back Japanese knotweed to plant because it was beautiful, but he didn't know that it evolved into a biological invasion.
In order to eradicate this creature, Britain has invested 6.3 billion yuan to no avail, but the growth rate of Japanese knotweed is too fast, and it is easy to survive, so from beginning to end, Britain has no way to take this "uninvited guest".
"Wildfires can't be burned, and the spring breeze blows and grows", as the so-called cutting grass must be eradicated, if it is not removed from the roots, then it will grow endlessly, and the harm of Japanese knotweed is no less than that of "bombs".
There was once a British man who went into his yard to prevent it, and once suffered from depression, when the Japanese knotweed slowly invaded his home, he became very aggressive, not only beat his wife to death, but also chose to commit suicide.
This is not an exaggeration, but it is a real situation, and wherever the Japanese knotweed invades, it will trigger countless abuses, because its appearance has seriously endangered the lives of the British, and also caused their house prices to fall.
Native to Japan, Japanese knotweed is a weed of the Liao family, and it has a strong reproductive ability, not only in extremely strong rocks, but also in small crevices.
It can generally grow to 2-3 meters, and it can grow to one meter in less than a month, and the most important point is that Japanese knotweed is extremely penetrating, like an impassable wall, and it is easy to be scratched if you do not wear protective tools during the cleaning process.
When London hosted the Olympics before, traces of Japanese knotweed were found, and it took a lot of effort to remove it in order for the Olympics to go smoothly, because they could easily pass through the buildings, which is why its appearance will reduce the price of houses in the United Kingdom.
Another distinctive feature of Japanese knotweed is that it is not afraid of water, and it can reproduce quickly from a single leaf, even if its leaves are still industrialized, so in order for Japanese knotweed to no longer grow and take root, it needs to be burned with fire.
But this method can only eliminate, the Japanese knotweed on the ground, it is difficult to eliminate the underground, the main reason is that the root system of the Japanese knotweed is extremely developed, the deepest can go straight to the ground 5 meters, or it is horizontal, spread seven or eight meters on the land.
In short, this creature will be pulled out and regenerated, and it will fall into a dead cycle, bringing some trouble to the surrounding crops and people, so does this creature have no natural enemies?
The answer must be yes, its natural enemy is the psyllid, which belongs to the sap-sucking insects of Japan, and it belongs to the genus Hemiptera, which is due to the fact that there are two small holes in the hind feet of the psyllid, which are specially used to place the stinky glands, and as long as they encounter danger, they will release the smell and flee for their lives.
With the presence of the psyllid, then the Japanese knotweed will have nowhere to hide, it will not directly come forward to gnaw on the roots or leaves, but rely on sucking, so that the leaves of the Japanese knotweed lose nutrients, so that it can not provide nutrients, which makes the residents stay away from trouble.
So why did the mainland choose to grow Japanese knotweed? In fact, the local knotweed in the mainland is not the same as the Japanese knotweed, but the name is the same, and it is easy to be mistaken in terms of appearance, and the status of knotweed in China is very high, equivalent to the existence of "baby".
The Chinese knotweed can be used as a Chinese medicinal material, it has the effect of clearing heat and detoxifying, invigorating blood and removing blood stasis, and can also treat daily bruises.
Knotweed is a perennial shrub-like herbaceous plant, its rhizome is usually lying horizontally underneath, its leaves belong to an alternate state, the flowers of knotweed are dioecious, its texture is extremely hard, the taste is slightly bitter and has a certain astringency.
How scary is a biological invasion?
In recent years, the invasion of alien species has been on the rise, and it has become the "natural enemy" of many animals and plants.
If we have to ask how terrible the biological invasion is, then it is no less than the "virus" that makes people panic, it is like a "pathogen" that erodes people's lives and destroys local economic development and construction.
Not only biological invasion but also species invasion, such as the ferocious alligator gar, which has no natural enemies since it arrived on the mainland, and no one can take it.
Then there is the flooded water hyacinth, which is an ornamental plant, but after arriving on the mainland, it causes harm to the mainland's water resources, and also robs the fish of nutrients, resulting in a large number of microorganisms and fish unable to grow, resulting in death.
Epilogue:
Biological invasion is a very common regional invasion, which provides people with ornamental at the same time, but also causes great trouble to people's lives, so in real life, you must not pick plants by hand because they are beautiful.
In order to prevent the invasion of alien species, the mainland has also done many methods, such as customs inspection, but there are still some species that directly "occupy" China, such as the Canadian goldenrod, so it is very important to prevent and stop it.
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