In context with pests, what does the term 'sap feeder' refer to?

The term 'sap feeder' specifically refers to insects that suck fluids from plants. These pests have specialized mouthparts adapted to pierce plant tissues and extract the nutrient-rich sap found within. This process allows them to obtain the sustenance they need for growth and reproduction.

Sap feeders can have significant impacts on plant health, as their feeding can lead to reduced vigor, yellowing of leaves, stunted growth, and in some cases, even plant death. Additionally, while some sap-feeding insects can transmit plant pathogens, the defining characteristic of a sap feeder is its method of feeding, not its role in disease transmission. This distinguishes them from other types of pests that may cause damage through different means, such as chewing plant tissue or burrowing into roots.