The borers are a type of beetle. The lesser grain borer is a “primary pest,” which alludes to the damage they cause to stored whole grains and other foods (secondary pests go after the damaged grain the primary pests fed on). Lesser grain borer beetles are dark brown or black with small pits on the wing covers. The borer will reduce grain to a mere shell. The most common infestation is of whole seeds such as corn or wheat. Control includes elimination of the infested source, freezing or cooking the food or, if the case is extreme, fumigation may be used. The borer when dead has an odor, which leaves food that was infested to be contaminated.