Pasture and grass hay-Spider mite

Banks grass mite (Oligonychus pratensis) Tetranychus spp.

Pest description and crop damage On timothy hay or timothy- alfalfa mixed-stand hay crops only. Spider mites silver and stunt hay crop. Can reduce yield of timothy hay crop.

Management-chemical control

  • 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. Suppression only.
  • cyfluthrin (Tombstone) at 0.04 to 0.044 lb ai/A. PHI 0 days. REI 12 hr. Retreatment interval 5 days. Do not exceed 0.176 lb ai/A per season.
  • 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. Suppression only.
  • hexythiazox (Ruger EC) at 0.078 to 0.186 lb ai/A. PHI 14 days. REI 12 hr. Limit 1 treatment per year. Timothy only.
  • malathion (Malathion 5EC) at 1.25 lb ai/A. PHI 0 days. REI 12 hr. One application limit per cutting.