感染浓核杆菌HaDNV-1的棉铃虫种群动态分析

ensovirus(HaDNV-1) is a mutualistic symbiont of Helicoverpa armigera, and the infected females occupy advantages in vertical transmission. In order to understand the influence of HaDNV-1 on the evolution of Helicoverpa armigera population, a new population model is established involving three species with competition and prey-pradator relationship. Without regard of the damage of HaDNV-1, the infected is dominant in Helicoverpa armigera population by analysing the stability of equilibria. The harm of HaDNV-1 being considered, the model s modified by raising the mortality of the infected adult and larva respectively to indicate the cost, thereby the mortality was evaluated to allow the infected pests toward perish.