The invader species got out of control because they wanted to come back when we didnt need them anymore. They started to mass reproduce and there were to many and it felt like we were being attack and they were killing alot of the native bugs that we have have because they needed to eat more.
Farmers use invader species the most because they want to comntrol the pest poulution problem on their plants and everything. The system helped everybody out at one point so they kept bringing them back evey year.
Invader species can be plants, animals, or people. They come into a habbitat and most of the time they outnumber a native species that is already there.
I think that its bad that we have species coming here that arnt native because i remember when we had a big lady bug problem and i felt like i was being attacked because they were in my room and all over my house so i dont think they belong here and the farmers need to find a different way to git rid of the bugs on their plants.