The profits from producing a crop should not be allowed to waste away in storage. Stored-grain Insects often cause as much loss after harvest as crop pests cause during the growing season.This type of Insects are divided into primary pests that attack whole kernels and secondary pests that feed on broken or cracked one. It has been estimated that between one quarter and one third of the world crop is lost each year during storage. Much of this is due to insect attack. In addition, grain which is not lost is severely reduced in quality by insect damage. Many pests preferentially eat out grain embryos, thereby reducing the protein content of feed and lowering the percentage of seeds which germinate.Insect pests also increase costs to growers both directly through the expense of control on the farm, and indirectly through the costs incurred by handling authorities in controlling weevils in bulk storages.Six-Step Prevention and Control ProgramStep 1: Keep bins clean and repaired.Never store new grain on old one, mix it with old or store it in a dirty bin. Old type and debris are the most important sources of Insects that attack new grains. Completely remove and burn all old one, broken kernels and other debris. Clean anywhere spilled item may have accumulated, including outside the bins, behind partitions, between walls and under floors. Fill any holes to prevent access by birds and rodents. Check the roof, as moisture from rain and snow can encourage insect development.Clean harvest and handling equipment before harvest. Avoid storing it near feed storage, animal feeders or stables. These areas may be sources of grain-infesting Insects.Step 2: Use residual sprays.After cleaning, treat all bin surfaces, including removable doors, behind partitions, and under floors, with an approved insecticide about two weeks before storing grain. The dosage will vary with the porosity of the surface being treated. Malathion may not be effective where Indian meal moth is a problem. Remove Insects killed by this treatment to avoid contaminating new one.Step 3: Store clean, dry grain.Moisture of corn should be less than 15 percent, while other grains should be at 12 percent or less. Minimize cracked kernels and other dockage. They allow some grain pests to build up at much lower temperatures than are required with whole grains.Step 4: Aerate.Proper aeration of the grain ensures uniform temperatures and thus avoids moisture buildups that encourage mold development. Molds directly affect its value. They also serve as alternate food sources for some grain pests, which increases the insect problem.Step 5: Protect the grain.Insecticides may be used to treat grain as it is moved into storage. Check the label for proper dosages. These materials also may be used to treat the surface of the item to provide a protective barrier against infestation. This barrier is broken whenever the surface is disturbed, such as during inspections for Insects. Retreatment is recommended after inspections.Step 6: Inspect grain regularly.If the grain mass is below 55 to 60 degrees F, inspect grain every two weeks. Above this temperature, inspect it weekly. This will detect new infestations early and avoid extensive damage.

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