The reason why Japanese giant knotweed can't wreak havoc in China is that there is a bug in China that eats this plant specially. The root of Polygonum cuspidatum is very long. It is said that they can be found three meters underground and the horizontal distance can reach seven meters. Whether it is high temperature or low temperature, they can live in relatively dry places or directly in water, and they grow very well. Therefore, this plant is regarded as an invasive species by others because of its tenacious vitality, but we have natural enemies of this plant in China. When they grow on the ground, this insect will directly climb on the Japanese giant knotweed, which will inhibit their growth in a large area when they chew, so the Japanese giant knotweed will never wreak havoc in China.
Polygonum cuspidatum is rampant in Britain. It is said that in order to make his garden more beautiful, an old man in England introduced Polygonum cuspidatum from Japan. Unexpectedly, in less than a month, Polygonum cuspidatum from Japan proliferated on a large scale, which almost turned his house into a dangerous house. Now Britain spends huge financial resources every year to deal with the spread of Polygonum cuspidatum from Japan, which can be said to have caused huge losses.
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