Abstract: Systems, methods and other means for evaluating durability of genetic traits for the control of damage by pests are provided. Inputs parameters associated with the genetic traits, pests, and one or more fields may be received by a computer and/or other type of machine, which may apply a computer-implemented model to determine, e.g., durability of the genetic traits. Some embodiments may also or instead include an output associated with, e.g., the durability. The computer-implemented model may provide, in some embodiments, for modeling dynamic movement of the pests within a Bt field and one or more of the fields being Bt fields. The computer-implemented model may also or instead provide, in some embodiments, for modeling blended refuge seed products.