翻译成学术型英文：在现有的防御植物病害过程中多数采用喷施化学药剂和改良栽培方式等措施减少真菌的感染。这些措施不仅增加了生产成本而且并不能从源头上解决植物病害问题。

In the current defense against plant diseases, the majority of approaches involve the application of chemical pesticides and the implementation of improved cultivation methods to reduce fungal infections. These measures not only increase production costs but also fail to address the root causes of plant disease problems.