The cactus that invaded Australia couldn t be wiped out with 2.4 billion, so why did it lose to a gr

Cactus invades Australia, why can't it be wiped out? When it comes to the country with the most species flooding, if Australia ranks second, I believe that no country dares to rank first. Many alien species will basically flood after stepping into Australia's territory.

In Australia, the rampant plant is the cactus, also known as the first palm, overlord tree, flame, etc., which is a clump of fleshy shrubs, up to three meters high, with dense spikes on the surface, native to Mexico, the United States and other places.

Clause. 1. Originally, there were no cacti in Australia, but the colonists introduced them in the early 19th century, and coincidentally, a batch of cacti were introduced at that time, and some of them happened to be infected with cochineal. Due to its tall and spiky cactus, it was widely used as a natural agricultural fence by the locals after entering Australia, and the cochineal insects slowly multiplied.

Later, it was accidentally discovered that the red carried by the cochineal itself was very bright and could be used as a dye. In the past, when synthetic dyes were not widely used, cochineal became a high-quality colorant. After the locals realized the value of the cochineal, as an important parasitic plant of the cochineal, they started a cactus among the people and tried to start establishing a cochineal dye industry.

However, due to the wishes, the cochineal insects died one after another due to unaccustomed water and soil. However, the cactus is completely unaffected and still thrives as usual.

Clause. Second, the reproduction is fast. As long as the cactus still has a little rhizome, give him enough time, even if it can grow into a cactus, the cactus quickly gained a place in Europe, and eventually occupied about 259,000 kilometers of land in eastern Australia, which can be called one of the world's largest biological invasions.

In order to control the number of cacti, the local area has formulated a lot of plans, the first step is physical control, ** mobilized the whole people, invested a lot of manpower and material resources, digging roots and digging soil, cutting and burning with knives, and basically used all the methods that can be imagined. Because many birds eat the fruit of cacti, the spread of birds has also contributed to the spread of cacti to a large extent.

Because Australia's climate is relatively hot, it is very suitable for cacti to grow, so it is said that it grows very fast. Australia is vast and sparsely populated, but there are not so many people living in the vast land, which is why cacti are overflowing.

This is because cacti are relatively survivable, they can survive in various deserts in Australia, and the seeds are easy to reproduce.

Because after the invasion, the cactus has undergone continuous changes and adaptations, and has become a species that is completely in line with the local environment.