Loss of OP's could lead to resurgance as a major pest. Pyrethroids would disrupt natural or induced predators of mite and would disrupt resistance management programs, i.e., acarcides would rapidly become useless due to increased usage to control pyrethroid-induced mite outbreaks. Bt adequate but expensive and rapidly inactivated by UV light. Lo Pyrethroids would harm aphid and mite predators and cause explosion in mite populations. Continued use would lead to resistance.
Carbamates are generally harsh on natural enemies of mite pests.
New England fruit growers have since the 1970's readily adopted Integrated Pest Management pratices. Many growers have moved beyond the first stages of IPM to a more bio-intensive level, using more cultural and biological practices to limit insect and disease damage. Plum Curculio is the most significant fruit insect pest in New England and the most difficult to control. No material other than OP's provide acceptable commercial control. Without an effective alternative control agent for Plum Curculio, commercial apple production in the Northeast would be impossible within 3-5 years.