The term “encroacher bush” is used for indigenous species and “invader bush” for alien invasive species. E.g. Prosopis is an alien invasive species from the Mesquite family and was introduced into the country in 1897 from America as a fodder plant. It destroys the indigenous vegetation, uses up great amounts of groundwater and contributes to the substantial decline in land productivity caused by bush encroachment.

Read more link: 5.1.2 (chapter) Encroachment by alien invasive woody plants baseline study