In 1870, when the United States imported the seeds of a plant flaxseed from Russia,
What is Tumbleweed?
Tumbleweed, whose scientific name is Russian thorn sandpon, is an annual shrub with heights ranging from 10 cm to 100 cm. In the Gobi, you will often encounter the tumbleweed plant, when the drought comes, they will collect their roots, and then form a ball, wandering around with the wind, the vitality is very strong. If you find a suitable place for them to grow, new shoots will be re-sprouted and beautiful flowers will bloom in lilac.
Isn't tumbleweed a "common" herb? What are the harms in the United States?
In the Northwest region of the United States, the most common is tumbleweed, almost all over the United States in the Great Northwest, although it is an ordinary shrub, but it seriously affects the lives of local residents.
When it is ripe, tumbleweeds quickly become withered and thus very fragile, and as soon as the wind blows gently, they will run around with the wind. And tumbleweed carries more than 200,000 seeds, as it spreads everywhere. As soon as there is enough water, it is easy to grow new tumbleweeds, resulting in tumbleweeds almost everywhere in the entire Northwest United States.
The large number of tumbleweeds not only encroaches on the growth space of native plants, but also has a great impact on people's travel and life. Sometimes when you're driving on the road, a large patch of tumbleweed may suddenly appear in front of you blocking your way. Sometimes, when you wake up, your home is surrounded by tumbleweeds, and you can't walk out, which greatly affects people's lives.
Tumbleweed not only has a very strong reproductive ability, but also has no natural enemies in the United States, cattle and sheep and other livestock can eat it and may be poisoned, so tumbleweed can be wanton in the United States.
Since the harm is so great, what measures will the United States take to control it?
The harm of tumbleweed is too great, and the United States did not have a good way to control the spread of tumbleweed in the first place. The only stupid way to do this is to burn it. Tumbleweed is very easy to catch fire, but it is difficult to control, if not careful, it is likely to cause a serious fire. So, then the United States came up with another approach.
In addition to burning, they also thought of a way to introduce natural enemies of tumbleweed, but in the end they were stopped before they even started. Because the natural enemies of tumbleweed will also cause serious damage to other local plants, if not properly controlled, the consequences will be more serious, that is, worse.
Finally, the United States plans to use the virus to eliminate tumbleweed. They extracted a virus that can infect tumbleweed in tumbleweed, and wanted to use virus biochemical means to achieve the purpose of eliminating tumbleweed.
Why is tumbleweed, a headache in the United States, so popular in China?
It is a useless weed in the United States, but it is indeed a delicacy in China, and it is also a traditional Chinese medicine.
In the United States, tumbleweed can be said to be wanton, a word will surround your home, but also block the road, some even block the river, seriously endanger the lives of residents, but also seriously affect the growth and reproduction of native plants, crops.
However, it is this kind of unbridled tumbleweed in the United States that does not survive to adulthood in China. Its fate is even worse than that of crayfish.
In China, we have also given it a very down-to-earth name, called pig hair grass. Tumbleweed is a relatively commonly used medicinal herb in Traditional Chinese medicine, which can moisten the intestines and laxatives. At the same time, it is also a kind of food, in China, as long as it can be eaten, it can not go out.
Tumbleweed can be said to be quite delicious, even in the eyes of Chinese who have a very sharp mouth, it is also a very delicious food. Therefore, many people in the mainland like to eat this kind of food with excellent taste and very nutritious food. As a result, the breeding speed of tumbleweed on the mainland simply cannot catch up with the speed of everyone's consumption, and it is in short supply on the mainland.
Summary.
The same is tumbleweed, which can live freely in the United States, and a delicacy on the table in China does not have the opportunity to become an adult. It's like two different kinds of treatment.
Like crayfish, as long as it can be eaten, there will be no day of spread in China, and no matter how powerful the invasive species are, they cannot escape the spatula of mainland chefs and the stomachs of the vast number of food lovers on the mainland.