According to Laurie Kerzicnik (Montana State University Entomologist), grasshoppers continue to be an issue for several areas in Montana. Grasshopper infestations will continue to extend into the fall. High grasshopper populations this year could be due to a couple of factors including an abundance of a yellow sweet clover in 2019 and a cold, wet spring in 2019 where grass was abundant and rising grasshopper populations were tolerated and mostly not managed.

Most grasshoppers overwinter in the egg stage in the soil. After egg hatch in mid to late spring, immature grasshopper (nymphs) immed...