Prevention of Stored Grain Pests
October 5, 2015
With harvest just around the
This is considered the most important part of a stored grain IPM
For proper sanitation:
- Inspect the roof for any leaks and repair if present.
- Remove old grain from
bin. It’s never advised to store new grain on top of oldgrain.
- Remove any grain, dust, or debris from inside the bin by sweeping or vacuuming. Be sure to brush down the walls as well as the floor.
- Clean any grain spills around the outside of the bin. These spills can be a food source for pests before they infest a bin.
- Clear a perimeter of 10 feet around the bin of any vegetation or garbage.
- Clean grain handling equipment before harvest. This includes augers, wagons, grain carts, trucks, combines, grain cleaners, and aeration fans.
- Inspect the bin for any cracks, holes, or gaps and seal if present.
- Seal the bin door once the bin has been filled.
If proper sanitation is conducted prior to storing
Pre-binning Insecticide Treatment
Prior to filling the bin, but after proper sanitation, the walls and floors should be treated with a residual insecticide. The outside walls and outside base of the bin may also be treated with an insecticide. This treatment should occur 2-3 weeks prior to filling the bin, and is most effective when temperatures are over 60°F due to increased insect activity. Table 2 contains some common residual insecticides that may be used for this treatment.
Grain that is going to be stored should be cleaned to remove cracked kernels, dust, or any other debris that can cause aeration issues later in the storage process. To ensure optimal
Generally stored grain does not require a protectant insecticide treatment unless it is going to be stored for more than one year. Protectant insecticides should be applied after the grain has been dried, and the moisture level is uniform. Depending on the insecticide it may be applied at the auger while the bin is being filled or as a top-dressing once the bin is filled. Table 3 provides a list of some common protectant insecticides.
Stored Grain Insects
If insects are present in the stored grain, proper identification is important, as some are internal feeders while others are external feeders. Internal feeders cause damage to the grain by feeding on the
Treating an Infestation
When an infestation of internal feeding stored grain pests is detected there are four management options. Move the grain and apply a protectant as it is being reloaded, feed the grain as is, sell the grain at a discounted price, and the fourth option is to fumigate the bin. Fumigant insecticides are extremely dangerous and due to their application method very hazardous to the applicator. Because of this, it is recommended to have a licensed professional apply fumigant treatments.
Source: Adam J. Varenhorst and Billy Fuller, South Dakota State University