One of the most common insects in stored grain is the Indian-meal moth, Plodia interpunctella (Hubner). These moths are called “flour moths” in Tennessee because they feed on flour or milled products. In farm grain bins, they prefer broken grains or grains damaged by other pests and seldom attack sound grain kernels. They cause problems by spinning webbings as immature. This causes lower quality in stored grain.
"SP341-W-Insects in Grain Bins," The University of Tennessee Agricultural Extension Service, SP341-W (Rev) 1/10 10-0125, http://trace.tennessee.edu/utk_agexcrop/22