By opening up some mines, you may be pleasantly surprised to see either the white cocoon of Pholetesor ornigis or the tiny, shiny black pupae of Sympiesis marylandensis . Both of these species are wasps that parasitize and kill LM larvae. Hopefully, you have a good population of these beneficial species in your orchard. The following chart appeared in earlier issues of IPM News but is included here again for your convenience. To conserve any T.pyri predator mites that might be in your orchard and thus enhance biological control, Pyramite would be the first choice if a miticide is needed.
Thorough coverage is required for optimum control.
Pyramite is restricted to two applications, with an application interval of 30 days between sprays. Note that the preharvest interval is 25 days. These mites are very difficult to see and require a 20x hand lens. They are usually found on the undersurface of the leaf. They are considered beneficial because they serve as an alternative food source for predator mites.