基本原理贮藏产品的害虫受某些病原细菌、病毒或原生动物引起一些疾病。这些疾病常使害虫致死,特别在幼虫阶段。它们不侵染人,亦不明显杀死有益的昆虫,比如捕食性的半翅目或寄生性的膜翅目昆虫。病原体的传播可通过几种途径:由于幼虫取食了被感染的幼虫或成虫的尸体;由于食进被感染的贮藏食物;通过交尾;或由于雌虫产卵时传给它的后代。一些疾病的爆发甚至会在自然环境中发 Rationale Pests that store their products are caused by certain pathogenic bacteria, viruses or protozoa. These diseases often kill pests, especially at larval stages. They do not infect humans and do not significantly kill beneficial insects, such as predatory Hemiptera or parasitic Hymenoptera. Pathogens can be transmitted in several ways: as the larvae feed on the bodies of the infected larvae or adults; as a result of ingestion of the infected stored food; by mating; or as the offspring passed to the female when it spawns. Some diseases even occur in the natural environment