Climate change affects on insect populations in many ways: it can cause a shift in geographical spread, abundance, or diversity, it can change the location, the timing and the magnitude of outbreaks of pests and it can define the phenological or even the genetic properties of the species. Long-time investigations of special insect populations, simulation models and scenario studies give us very
important information about the response of the insects far away and near to our century. Getting to know
the potential responses of insect populations to climate change makes us possible to evaluate the
adaptation of pest management alternatives as well as to formulate our future management policy. In this
paper we apply two simple models, in order to introduce a complex case study for a Sycamore lace bug
population. We test how the model works in case the whether conditions are very different from those in
our days. Thus, besides we can understand the processes that happen in present, we can analyze the
effects of a possible climate change, as well
