Tiny Black Bugs in Your Flour? Here’s What’s Really Going On (And What to Do Next)

This is where Things get a little uncomfortable.

Flour weevils don’t sneak in after you get home. The process usually starts much earlier—during grain storage or processing.

Adult weevils lay eggs directly on the grain. Those eggs are microscopic, basically invisible. Then the grain gets milled… packaged… shipped… and ends up on your shelf.

Everything looks perfectly normal.

Until one day, those eggs hatch.

And suddenly, your “sealed” flour isn’t so sealed after all.

Wait—So a Sealed Jar Doesn’t Help?

It helps… but not in the way you think.

A sealed container keeps new bugs out. That part is true.

But it doesn’t stop what’s already inside.

If eggs are present—and they often are—they’ll hatch regardless. Even in low-oxygen environments. Even in containers that seem airtight.

It’s a bit like locking the door after someone’s already in the house.

Signs You Might Have a Bigger Problem

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