Pacific Northwest Insect Management Handbook

Clover hay-Grasshopper

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Redlegged grasshopper
Melanoplus femurrubrum DeGeer
Egg(s) on host
© Ken Gray Insect Image Collection
Image related to Clover hay-Grasshopper
Migratory grasshopper
Melanoplus sanguinipes Fabricius
Female adult
© Ken Gray Insect Image Collection

Includes several species, especially Melanoplus spp.

Pest description and crop damage Both young and adult grasshoppers damage by feeding on leaves.

Management-chemical control

  • azadirachtin (Neemix 4.5) at 0.015 to 0.021 lb ai/A. REI 4 hr. PHI 0 days. OMRI-listed for organic use.
  • Beauveria bassiana GHA (Mycotrol ESO, BoteGHA ES) at 0.25 to 1 quart in 5 to 100 gal water/Acre. Adjust water volume to ensure good coverage but avoid runoff. PHI 0 days. REI 4 hr. OMRI-listed for organic use.
  • chlorantraniliprole (Coragen, Prevathon) at 0.026 to 0.065 lb ai/A. PHI 0 days. REI 4 hr. Do not exceed 0.2 lb ai or 4 applications per season.
  • malathion ULV (Fyfanon ULV) at 0.61 lb ai/A. PHI 0 days. REI 12 hr. Limit 2 treatments per cutting. Retreatment interval 14 days.
  • malathion (Drexel Malathion 5EC) at 1 to 1.25 lb ai/A. PHI 0 days. Limit 2 treatments per cutting. Retreatment interval 14 days. REI 12 hr.

Kaur, N. (Ed.). 2024 Pacific Northwest Insect Management Handbook.
© Oregon State University.

Use pesticides safely!

  • Wear protective clothing and safety devices as recommended on the label. Bathe or shower after each use.
  • Read the pesticide label—even if you’ve used the pesticide before. Follow closely the instructions on the label (and any other directions you have).
  • Be cautious when you apply pesticides. Know your legal responsibility as a pesticide applicator. You may be liable for injury or damage resulting from pesticide use.

Trade-name products and services are mentioned as illustrations only. This does not mean that the participating Extension Services endorse these products and services or that they intend to discriminate against products and services not mentioned.