Pasture and grass hay-Grasshopper

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

  • beta-cyfluthrin (Baythroid XL) 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 WSB) 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 season.
  • carbaryl (Sevin 4F) 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.
  • carbaryl (Sevin 5 Bait) at 1.5 lb ai/A. PHI 7 days for harvest or grazing. REI 12 hr. Retreatment interval 14 days.
  • chlorantraniliprole (Coragen) 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.
  • chlorantraniliprole/lambda-cyhalothrin (Besiege, Voliam Xpress) at 0.059 to 0.098 lb ai/A. 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 0.04 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, 25W) at 0.015 to 0.03 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 0.03 lb ai/A (0.5 oz ai/A) per cutting or 0.09 lb ai/A (1.5 oz 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) 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 (Malathion 5EC) at 1.25 lb ai/A. PHI 0 days. REI 12 hr. One application limit per cutting.
  • malathion (Fyfanon ULV) at 0.62 to 0.93 lb ai/A. PHI 0 days. REI 12 hr. Apply by air when hatch is complete. Do not apply if rain is imminent. Most effective when air is above 70°F. Limit 1 treatment per cutting.
  • zeta-cypermethrin (Mustang, Mustang Maxx) Mustang at 0.035 to 0.05 lb ai/A; Mustang 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.