Publications for:

pest = Melanoplus differentialis
crop = Alfalfa/lucerne (Medicago sativa)

found 2 publications:

1976

Grasshopper-resistant alfalfa selected in the field
Environmental Entomology (1976) 5 (3), 572-574
pestinfo wiki

1963

Food-plant tests with the differential grasshopper
Journal of Economic Entomology (1963) 56 (3), 397-399
pestinfo wiki