Which of the following is not one of the four main groups of pests?

The classification of pests typically includes four main groups: weeds, pathogens, insects, and vertebrate animals. Weeds are unwanted plants that compete with desirable crops for resources. Pathogens encompass diseases caused by microorganisms such as bacteria, viruses, and fungi that affect plants and animals. Vertebrate animals often include pests like rodents and birds that can have significant impacts on agricultural operations.

Fungi, while they are indeed a type of pathogen and can cause diseases in plants and animals, do not represent a standalone group within the primary classifications of pests. Instead, they fall under the broader category of pathogens since they are responsible for specific diseases in crops. By understanding these groups, you can more effectively identify and manage pest issues within agricultural settings.