The introduction of a virus to control an invasive species is an example of

Biological control

Explanation:

An invasive species is the disturbing, deadly species for the members of the native species. The introduction of the biological agents such as viruses, fungi, predators and parasites can reduce the growth, and abundance of the invasive species. This type of control of invasive species is called as biological control.

On the basis of above description, the introduction of viruses to control invasive species is the example of biological control.