Recently, the eradication of "Canada's yellow flower" in many places in China has aroused the attention of all sectors of society. So, what exactly is a yellow flower in Canada? It can have such a big impact. Let's follow the eleven-degree xiaobian to understand some of the characteristics of a yellow flower in Canada.
A yellow flower in Canada
According to encyclopedic knowledge, a yellow flower in Canada, its scientific name is: Solidago canadensis L. (anyway, it is a foreign name), belongs to the Asteraceae family, also called yellow warbler (estimated to be named after the color of the flower), unicorn grass and other names. It is a perennial herb. The flower diameter is developed, up to 1.5-3 meters high, and the leaves are lanceolate, about 10 cm long. The inflorescence is small, only 4-6 mm.
There are extremely developed rhizomes, extremely vigorous vitality, with super reproductive ability (a single plant can reproduce 20,000 seeds), can spread in a large area, thus destroying the ecological balance.
Because of its strong vitality, the Canadian yellow flower grows mostly on river beaches, wastelands, highways and farmland. It competes with surrounding plants for nutrients until other plants die. The inherent saying that "yellow flowers are too much to grow in grass" is called ecological killer, and it is also called the overlord flower.
In many places in China, a yellow flower in Canada has appeared, and it has recently been found in Wuhan, south of the Yellow River in Henan and other places.
In the season when other plants have withered yellow, a Canadian yellow flower is still yellow-leafed and lush growing, because a Canadian yellow flower has a very developed rhizome and can run wild underground, thus robbing other surrounding plants of nutrients, and other plants have long been unable to compete with it. Moreover, the roots of a Canadian yellow flower will also secrete a substance that inhibits the growth of seedlings, which makes it impossible for the plants around it to grow better, or even germinate. As a result, the plants around a yellow flower in Canada will continue to wither.
The main hazards are that the ecological balance has been severely affected and threatens biodiversity.
A yellow flower in Canada has caused more than 800 acres of orange trees in Ningbo, Zhejiang Province, China to reduce production, and even to the end of harvest. It can be seen that its harm is very large. Therefore, the joint deployment of many departments in our country, and call on relevant departments to organize the people, we must resolutely eradicate this "devil overlord flower".
Manually eradicate a yellow flower from Canada
Since this flower lacks natural enemies in our country to inhibit its growth, it must be done artificially if it is to be completely eradicated.
1. Manual eradication.
From March to May every year, the plant just begins to germinate and grow, directly eradicated, it is best to dig out the rhizome and burn it. From August to September, the plant has just flowered, but the seeds are not yet mature, and the whole plant can be uprooted and burned.
2. Drug killing.
From March to May every year, the plant just begins to sprout and grow, spraying herbicides such as glyphosate, which is simple to operate, but it will cause pollution to the soil environment, so use with caution.
3. Introduce natural enemies.
There is an insect called the white-striped silver moth, which will lay eggs into the stem or bud of a Canadian yellow flower, and when the larva hatches, it will feed on it, thus effectively inhibiting the growth of a Canadian yellow flower. But after all, this insect is also an alien species and is still being studied and tested.
White-striped silver-striped nocturnal moth
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