Insect-Damaged Corn and How Cleaning Can Recover Useful Grain

Recover the useful corn remaining in the lot

Corn with insect-feeding holes can still contain useful grain worth recovering. When feeding leaves a lighter, hollowed-out fraction mixed with fuller kernels, airflow cleaning offers a way to separate damaged material and retain useful corn. The opportunity comes from the physical change inside the kernel—not simply the visible hole.

Look beyond the hole

University of Minnesota Extension identifies hollowed-out seeds and beetle exit holes as signs of stored-grain feeding damage. SDSU’s corn pest guidance explains that direct insect feeding reduces kernel weight. That loss of material creates the cleaning opportunity.

Metra ADS aerodynamic grain cleaners and ADS-CDC help separate insect-damaged corn from fuller, more valuable kernels using controlled airflow.

Insect feeding can hollow out kernels and reduce their mass. When damaged kernels respond differently to airflow, ADS can direct them into separate fractions while retaining useful corn.

This offers three practical advantages:
– Recover valuable corn: Concentrate fuller, useful kernels in the retained fraction.
– Remove damaged material: Separate lighter, hollowed-out kernels from the useful grain.
– Adjust the separation: Fine-tune airflow and fraction settings according to the characteristics of the harvested corn.

The goal is to recover a cleaner, more uniform corn fraction from a lot containing insect-damaged kernels.

A Metra sample test helps demonstrate how the actual corn separates and which settings produce the desired result.

Keep storage pest management going

Separating damaged kernels and controlling a live infestation are different jobs. Minnesota Extension notes that immature insects can remain concealed inside seeds. Cleaning should not be treated as eradication of insects, eggs or internal larvae.

Continue routine monitoring of stored corn for pest activity, as SDSU recommends. If the retained corn will go into another storage, prepare that destination first: remove old grain and clean storage surfaces. Penn State Extension’s storage guidance explains that old grain can harbor insects that infest incoming grain.

See how your corn separates

Want to recover more useful corn from a lot containing insect-damaged kernels? Metra offers free grain sample testing to demonstrate how ADS separates lighter damaged material from fuller, valuable corn. During the demonstration, you can compare the original corn with the cleaned and removed fractions, see how much useful grain is retained, and get recommendations for suitable equipment and settings.

You don't need to choose a machine first. Metra helps select the cleaning approach based on your actual grain.

Contact [info@graincleaner.com](mailto:info@graincleaner.com). Your Metra manager will confirm the sample quantity, shipping arrangements and any associated costs before you send it.