TY - JOUR TI - New perspective to disease and insect infection model AU - Zhu Qing AU - Wei Chun-Fu JN - Thermal Science PY - 2024 VL - 28 IS - 4 SP - 3535 EP - 3539 PT - Article AB - The main purpose of this paper is to study a class of forest disease and insect infection models with time delay. The exact solutions are successfully obtained by using the homotopy perturbation method.