Includes several species, especially Melanoplus spp.
Pest description and crop damage Both young (nymphs) and adult grasshoppers feed on clover leaves, resulting in reduced leaf area and potential crop loss. Severe infestations cause stunting and affect hay quality.
Management-chemical 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.
- chlorantraniliprole (Coragen, Prevathon, Shenzi 400SC, 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 or 4 applications 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 or 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.