The spread of infection in seasonal insect-pathogen systems

Two distinct host-pathogen models with Free-living infection stages and hos t movement are developed taking into account the fact that For many species the environment produces defined seasons. Thr models predict that a travel ling wave of infection will sweep across the landscape. au av from the poin t of pathogen introduction Seasonality may reduce the range of disease spre ad compared to equivalent nun-seasonal systems, and under certain circumsta nces the inclusion of seasonality is responsible for producing hollows in p revalence behind the wavefront. The models allow us to examine and challeng e the conventional views of pathogen dispersal (in which so-called 'interfe rence' of multiple waves from separate epicentres is sometimes invoked).