larvae (of a noctuid moth) that travel in large groups and destroy grains and alfalfa in the midwestern states

larvae (of a noctuid moth) that travel in large groups and destroy grains and alfalfa in the midwestern states

larvae (of a noctuid moth) that travel in large groups and destroy grains and alfalfa in the midwestern states

larvae (of a noctuid moth) that travel in large groups and destroy grains and alfalfa in the midwestern states