When a native Io moth population booms locally, causing defoliation, what term is considered more accurate than 'invasion'?

Answer

Outbreak.

Thinking about temporary localized heavy feeding by a native population in terms of an 'outbreak' is more accurate than 'invasion,' as an outbreak occurs when natural predators are temporarily insufficient to control the booming native numbers.

When a native Io moth population booms locally, causing defoliation, what term is considered more accurate than 'invasion'?
animalinsectmothinvasion