多种病原物混合浸染的昆虫流行病模型

两种或两种以上的病原物同时浸染昆虫寄主时, 病原物之间的相互作用表现为偏 利、偏害、中性及竞争等类型,寄主群体的病症可呈多种形式1]。根据单种病菌的重叠浸染原理, 建立了多种病原物混合浸染时以温度、病原接种量、虫龄及湿度为因子的昆虫流行病模型,由模 型可计算寄主群体中不同病原物的致病比率,及寄主群体的总发病率,给出了模型的参数求解算 法,以及病原物相互作用类型的判定准则,这类模型可用于多种病原物混合浸染的昆虫流行病预 测,也可作为多种病原物混合施用防治害虫的最优化模型。

A Mathematical Models to Describe Mixture Infection of Multi-Species Pathogens to Insects

When insect host has been infected with more than one species of infectious pathogens, the interactions between different pathogens will be emerged as the types of mutualism, competition, etc., and the infection symptoms in host population will be divergent. According to the overlapping infection theory, the mathematical model to describe mixture infection of multi-species pathogens which take the temperature, inoculums number, insect instars, and moisture as driving variable, have been developed in this paper.