Each region has its own unique ecosystem, a variety of organisms maintain a balanced relationship with each other, china before, there were many areas of the rabbit, but when the rabbit living environment changes, not only the number of hares reduced, but also some of the hare as food for large animals will also be due to food shortages, and the number of reductions. Fortunately, with the improvement of the ecological environment today, the number of hares in various places has recovered to a certain extent. It can be seen that the importance of the biological chain in a region, but when the biological chain system is broken by alien species, the harm caused by it is also very, very large.
In Australia, there is such a plant, after being brought to this territory, it brings endless harm, and even people once spent 2.4 billion yuan to eliminate it, but the effect is not good. This plant is the cactus, Australia in the 18th century, or under the British colonial rule, there was a bug called cochineal worm at that time, using it can be extracted and processed a natural non-toxic safety dye called cochineal, in the 18th century, the British army clothes used in the dye raw material is this cochineal red. But at that time, the breeding of cochineal was monopolized by Spain and the price was expensive, and in order to change this phenomenon, the British colonists planned to introduce cochineal into Australia for artificial breeding in order to reduce the cost of dyes.
Because cochineals are very fond of parasitizing cacti plants, the British also introduced cochineal cacti from South America to New South Wales in Australia for cultivation. In the beginning, people did not care about the expansion of the cactus, after all, it was introduced to feed the cochineal. However, the local climate and other reasons did not allow the cochineal to develop in the end, but the barren-tolerant and extremely tenacious cactus ushered in a crazy expansion and reproduction. The later Industrial Revolution made the natural dye raw material of carmine lose its main use, and was gradually replaced by synthetic pigments, and cochineal also withdrew from the stage of history.
But at this time, the people of New South Wales also began to show back, the cactus brought great trouble to the local area, the local people called it "overlord tree", it can not only carry out sexual reproduction, but also can carry out asexual reproduction, but where there is a little root, stem can continue to grow tenaciously, the highest cactus can grow to about 10 meters in the local area, comparable to a towering tree, and countless local walking animals in Australia are more helpful for the reproduction of cacti, the fruit of the cactus is sweet and juicy, Not only do reptiles such as cattle and sheep like to eat, but also birds like to peck. The seeds were also brought to other regions by them.
The rapid expansion of cacti has brought endless harm, not only encroaching on the farmland of farmers, but also making other plants lose the living space, in the 1920s, cactus became the most serious invasive species in Australia's history, farmland, roadsides are the figure of cacti, let people taste endless troubles. Later, people used physical and chemical methods to treat it, spending nearly 2.4 billion yuan and failing to eliminate them, but later using a small moth called the cactus moth to control the cactus, achieved excellent results, this larvae use the cactus as food to become the biggest natural enemy of the cactus.
Nowadays, the cactus in Australia is controlled, but in contrast, in China, the cactus is a very good cash crop, its fruit can be edible, juiced, but also a very good medicinal material, but also a plant with ornamental value. It can be said that the current situation of cacti in our country is diametrically opposed to the treatment that was once treated in Australia. What do you think of this, and look forward to your message.