What is "frass" in relation to insects?

Frass refers specifically to the excrement produced by insects, particularly those that are herbivorous or wood-boring. This material often consists of undigested plant material and can vary in texture and appearance depending on the species of insect. Frass is commonly found in areas where insects such as caterpillars or termites are active, and it can serve as an indicator of insect infestations.

Understanding frass is important in pest management, as its presence can help identify which pests might be affecting a particular area, allowing for targeted treatment strategies. This knowledge is useful for those involved in pest control and related fields.