Control weeds and grasses, since they can harbor insect and rodent pests. Inspect outside walls and especially the base and roof for damaged areas that could allow pests and moisture to enter. Equipment Grain handling equipment should be kept clean, also. Cleaning storage bins is of little value if you fill them using contaminated equipment. The physical condition of the grain plays an extremely important role in long-term storage.
Insects require both moisture and warmth in order to feed and reproduce.
Although these requirements will vary by species, grain moisture above 12 percent and temperature between 60 and 90 F will allow normal growth and reproduction. In general, grain stored under conditions which maintain high quality will be less susceptible to insect infestation.