Rangeland-Mormon cricket

Anabrus simplex

Pest description and crop damage Flightless, heavy katydids that feed on many range plants as well as on small grains and alfalfa. They migrate from pastures into crop fields during outbreak years.

Management-biological control

  • Nosema locustae (NOLO Bait Biological Insecticide)-Apply early in the season, as the over-wintering grasshoppers emerge. Two to three weeks may be required for initial effect. Broadcast 1 to 2 lb/acre around the entire infested area, as well as outlying areas such as drying grasses and fields. Heavy infestations may require repeated applications.

Management-chemical control

  • carbaryl (Carbaryl 4L) at 0.5 quart ai/a. PHI 0 days. Reduced Agent and Area Treatment (RAAT) is required. Do not exceed 1 quart ai/a per year. REI 12 hr.
  • carbaryl (Sevin 5 Bait) at 20 lb per acre with no more than one application per year-ground application only.