This article from Nebraska also suggests turkeys as well as some other natural controls.
http://www.ianrpubs.unl.edu/pa...
the parasites may be available through your country agent or State agricultural university.
You could also check with other growers in that area and see what they do.
One problem with grasshoppers is that they will go away, and then you forget about what a nusiance they were and the conditions that favor them are allowed to proliferate -- then they are back worse than ever in a few years.
