An overview is given of the significance of three- and four-membered rings in crop protection chemistry. The main herbicidally, fungicidally, and insecticidally active small ring derivatives are presented, together with their synthesis routes, modes of action and biological efficacies. Also the most important small ring containing natural products, which are active against weeds, insects and fungal plant diseases are covered. In addition, the role of three- and four-membered rings as intermediates in the synthesis of agrochemicals not containing such a small ring component is reported.

中文翻译：

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作物保护中的小环化学

概述了三元环和四元环在作物保护化学中的重要性。介绍了主要的除草，杀真菌和杀虫活性小环衍生物，以及它们的合成路线，作用方式和生物功效。还涵盖了最重要的含有天然产物的小环，其对杂草，昆虫和真菌植物病害具有活性。另外，据报道三元和四元环在不包含如此小的环组分的农用化学品的合成中作为中间体。