What does the larva of an internal feeder develop in?

The larva of an internal feeder specifically develops within the grain or kernel. Internal feeders are pests that burrow into their food source, which provides them with protection and sustenance as they grow. For instance, larvae of species such as grain borers, weevils, or other cereal pests thrive by consuming the stored grains, which allows them to complete their lifecycle within that environment. This ability to feed internally gives them a significant advantage in terms of access to food and a reduction in predation risk, ultimately facilitating their development into mature insects able to reproduce. In contrast, other materials like fresh produce, wood, or exposed liquids are not typical environments for the larvae of internal feeders to develop, as they do not provide the necessary conditions or food sources for these specific pests.