An object-oriented, behavior-based approach was used to simulate the development of a crop and associated components. The implementation details of this new object oriented cotton plant model and Heliothis spp. development model are discussed. The coupling mechanisms that permit the plant and the insect pest to interact are described. It was concluded that the object-oriented paradigm provides the ability to more accurately represent the cotton crop and the behavior of insects foraging on it allowing more realistic, precise, and general simulations; all of which results in a more optimal, more rational management of the cotton crop.