However, they will feed on other parts of the kernel, as well as mold growing on the grain. These mites are responsible for the spread of various fungal spores throughout a grain mass and into adjoining bins. When present in large numbers, the flour or grain mites promote sweating and impart a disagreeable odor to the grain. Some persons may be allergic to mites. Proper bin sanitation before introduction of new grain minimizes the need for pesticides.
Good sanitation involves the removal of old grain and dust in and around the grain bin.
This includes removal of old grain from corners, floors, and walls and grain that may have spilled on the exterior of the bin. Any grain remaining when a bin is emptied can harbor insect infestations which will move into the new grain. After the bin is cleaned, and all needed repairs have been made, the floor and wall surfaces both inside and outside the bin should be treated. Take special care to treat all cracks, crevices, and areas around doorways and other places where insects hide or enter. Spray the bins about four to six weeks prior to storing grain if the grain is to be stored longer than six months.