Small grain-Wheat stem sawfly

Cephus cinctus

Pest description and crop damage Primarily a pest in Montana.

Management-chemical control

Foliar sprays

  • zeta-cypermethrin (Mustang) at 0.04 to 0.05 lb ai/a . PHI 14 days, also for forage and hay. REI 12 hr. Use for adults. Retreatment interval 14 days. Do not exceed 0.25 lb ai/a per year. Barley, wheat and triticale only.
  • zeta-cypermethrin/chlorpyrifos (Stallion) at 0.22 to 0.28 lb ai/a. PHI 14 days for forage or hay; 28 days for grain and straw. REI 24 hr. Retreatment interval 14 days. Do not allow meat or dairy animals to graze within 28 days of application. Do not exceed 0.05 lb ai/a zeta-cypermethrin or 0.5 lb ai/a chlorpyrifos per season. Wheat only.