Many species, including:
Clearwinged grasshopper (Camnula pellucida)
Lesser migratory grasshopper (Melanopus sanguinipes)
Redlegged grasshopper (Melanoplus femurrubrum)
Twostriped grasshopper (Melanoplus bivittatus)
Pest description and crop damage Both nymphs and adults can damage plants by feeding on the foliage, stems and heads. May attack any cereal crop.
Management-chemical and biological control
- azadirachtin (Atrevia 3% SL) at 0.019 to 0.03 lb ai/A. REI 4 hr. PHI 0 days. OMRI-listed for organic use.
- Beauveria bassiana GHA (BotaniGard ES, BoteGHA ES, Botanigard Optima ES, BoteGHA Optima ES, Mycotrol Optima ESO, Principle WP) BotaniGard ES, BoteGHA ES at 0.25 to 1 quart in 5 to 100 gal water/A; Botanigard Optima ES, BoteGHA Optima ES, Mycotrol Optima ESO at 0.25 to 1.25 quarts in 5 to 100 gal water/A; Principle WP at 0.25 to 1 lb of product per 100 gal/A. Adjust water volume to ensure good coverage but avoid runoff. PHI 0 days. REI 4 hr. OMRI-listed for organic use.
- beta-cyfluthrin (Baythroid XL, Cryptoid XL, Sultrus) at 0.02 to 0.022 lb ai/A. PHI 0 days for grazing or hay. REI 12 hr. Do not exceed 0.089 lb ai/A per season. Retreatment interval: 5 days.
- bifenthrin (Brigade 2EC, Discipline 2EC, Sniper, Bifenture EC, Discipline 2EC, Lancer 2EC) at 0.05 to 0.1 lb ai/A. PHI 30 days for forage and hay. REI 12 hr. Retreatment interval: 14 days. Do not exceed 0.2 lb ai/A per year.
- carbaryl (Drexel Carbaryl 4L, Carbaryl 4L, Sevin XLR ) at 0.5 lb ai/A. PHI 14 days. REI 12 hr. Limit 2 treatments per year. Retreatment interval 14 days. Do not exceed 3 lb ai/A per year.
- chlorantraniliprole (Prevathon, Coragen, Vantacor, Plaid SC) at 0.026 to 0.065 lb ai/A. PHI 0 days. REI 4 hr. Do not exceed 0.2 lb ai/A or 2 sequential applications per season. Retreatment interval 7 days.
- chlorantraniliprole/lambda-cyhalothrin (Besiege, Voliam Xpress) at 0.0391 to 0.0652 lb ai/A for chlorantraniliprole and 0.0195 to 0.0325 lb ai/A for lambda-cyhalothrin. PHI 0 days for grazing or cut for forage; 7 days for cut grass to be dried and harvested for hay. Retreatment interval: 7 days. REI 12 hr. Do not exceed 0.09 lb ai/A lambda-cyhalothrin or 0.2 lb ai/A chlorantraniliprole.
- cyfluthrin (Tombstone) at 0.041 to 0.044 lb ai/A. PHI 0 day. REI 12 hr. Retreatment interval: 5 days. Do not exceed 0.176 lb ai/A per season.
- diflubenzuron (Dimilin 2L, Cavalier 2L, Unforgiven, Ventrilix 2L, Durant 2 L IGR ) at 0.016 to 0.031 lb ai/A. PHI 1 day for cutting. REI 12 hr. Apply when the majority are in the 2nd through 4th instar. Do not exceed 0.031 lb ai/A per cutting or 0.094 lb ai/A per year.
- gamma-cyhalothrin (Declare) at 0.01 to 0.015 lb ai/A. PHI 0 days for grazing or cut for forage; 7 days for cut grass to be dried and harvested. REI 24 hr. Do not exceed 0.045 lb ai/A per season.
- lambda-cyhalothrin (Warrior II, Lambda-Cy EC, Ravage II, Crusader 2ME) at 0.02 to 0.03 lb ai/A. PHI 0 days for grazing and forage; 7 days to be dried for hay. REI 24 hr. Do not exceed 0.03 lb ai/A per cutting or 0.09 lb ai/A per season.
- malathion (Drexel Malathion 5EC, Malathion 57 EC, Fyfanon 57% EC, Martin's Malathion 57%, Gowan Malathion 8, Malathion 8-E)- Drexel Malathion 5EC, Malathion 57 EC, Fyfanon 57% EC, Martin's Malathion 57% at 0.94 to 1.25 lb ai/A; Gowan Malathion 8, Malathion 8-E at 1 to 1.25 lb ai/A. PHI 0 days. Limit 2 treatments per cutting. Retreatment interval 14 days. REI 12 hr.
- zeta-cypermethrin (Mustang, Mustang Maxx, Cortes MAXX) Mustang at 0.035 to 0.05 lb ai/A; Mustang Maxx or Cortes MAXX at 0.0175 to 0.025 lb ai/A. PHI 3 days for cutting and grazing; 7 days for seed. REI 12 hr. Do not apply more than 0.05 lb ai per cutting or 0.15 lb ai per season of Mustang or 0.025 lb ai per cutting and 0.075 lb ai per season of Mustang Maxx. Retreatment interval: 7 days.
Management-biological control
- The use of the fungal pathogen Beauveria bassiana, has shown >70% reduction in grasshopper populations in field trials.