The Release of Bio-Control Insects for Spotted Knapweed Invasion
The release of bio-control insects is a carefully controlled process. The various species released on spotted knapweed took place over 15+ years, one species at a time. Competition between these species, as well as effects of predators in the new environment have resulted in success for only a few of the released insects. Spotted knapweed in Western Montana at this time seems to be in a cycle of suppression and release imposed by these few remaining insect species.
Good, William, "The Release of Bio-Control Insects for Spotted Knapweed Invasion" (2017). Guest Lectures. 46.