Here is one problem created by people who like to travel and bring "live" souvenirs. It is totally creating an imbalance to the ecosystem of a certain place when foreign species are released in to the wild.
In UK they have a japanese weed that grows so fast it affects several areas of vegetation. Invasive in several countries, they found a way to control this alien plant by using another alien species.
A superweed spreading throughout the UK could be brought under control by introducing plant-eating predators from Japan, scientists believe.
Japanese knotweed was first introduced as an ornamental plant, but has since plagued the environment; removal is costly and time consuming.
Now a team has identified natural predators from its native home that could also control it in the UK.
The plans have been submitted to the government for approval.
If the proposal gets the go-ahead, it will be the first time that biocontrol - the use of a natural enemy to control another pest - will be used in Europe to fight a weed.
I just hope this "FOREIGN nymph" does not create another problem.



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