 Late in the season, we often recommend using an insecticide like Lorsban or Capture that can also slow down spider mites or at least not cause terrible mite flare-ups. Spider mites are worse in hot, dry years. In our area, it has been cool and wet this season. That's why we'll likely run with a cheaper pyrethroid like Silencer for around $2 an acre. Silencer is outstanding on most insects we fight in corn, soybeans, and wheat. While some areas have issues with pyrethroid-resistant soybean aphids, we do not, at least at this point.