By Blake Jackson
As corn harvest approaches, growers should take steps to prepare grain storage facilities to reduce the risk of insect infestations.
According to Anna Hodgson, Extension Educator at Penn State Extension, and John Tooker, Professor of Entomology at Penn State Extension, stored-grain insects such as beetles and moth larvae can quickly infest grain if proper sanitation measures are not followed. Their recommendation is simple: “start clean to stay clean.”
Proper sanitation is the most effective defense against stored-grain pests. Before storing new grain, all old grain should be removed from bins, as leftover grain often serves as a breeding ground for insects.
Walls, floors, vents, seams, doors, and false floors should be thoroughly cleaned by sweeping, vacuuming, or washing. Any cracks, holes, or damaged areas should be repaired to prevent pests from entering or hiding within storage structures.
Growers should also inspect the areas surrounding storage bins. Old grain spilled outside the bin should be removed, and grass or weeds around the structure should be mowed to eliminate habitats for insects. Harvest equipment should also be cleaned to ensure no residual grain remains.
After cleaning, grain bins can be treated with a residual insecticide. Applications should be made two to three weeks before filling the bin.
For grain intended for long-term storage, approved grain protectants may be applied during loading to provide additional protection against insect activity.
Corn cribs require special attention because their open design makes pest management more challenging. Since fumigation is generally not an option, annual cleaning is essential. New grain should never be added on top of old grain, and residual sprays or grain protectants may help reduce infestations during extended storage periods.
When using pesticides, always follow label instructions and safety precautions. Store products safely, keep them away from children, pets, and livestock, and dispose of containers properly to prevent environmental contamination.
FAQs
- Why should grain bins be cleaned before harvest?
Cleaning removes old grain and insect populations that could infest newly stored grain.
- What is the best way to prevent stored grain insects?
Thorough sanitation before storing grain is the most effective prevention method.
- When should residual insecticides be applied?
They should be sprayed inside cleaned bins 2 to 3 weeks before filling them.
- Should harvest equipment be cleaned as well?
Yes, leftover grain in equipment can carry insects into storage facilities.
- Can new grain be stored on top of old grain?
No, mixing new grain with old grain increases the risk of insect infestations.
Photo Credit: getty-images-chinaface
Categories: Pennsylvania, Crops, Corn, Soybeans