One serious economic pest is established each year on average.

It is a serious horticultural pest in large parts of Europe.

They are quite serious pests, and can be hard to get rid of.

They remain serious pests, but some controls have been introduced.

The latter is a serious pest of sweet potato in China.

They are now considered to be the most serious pest for floricultural plants across much of the world.

It can occasionally become a nuisance, but is not considered a serious pest.

The larvae are often considered a serious pest of many tree species.

During the late 20th century it became a serious pest in South America as well.

The mosquito is a serious pest in many parts of the world.