How to eliminate lesser grain borers from the home?

How to eliminate lesser grain borers from the home?

Eliminating lesser grain borers requires more thoroughness than for other stored-grain pests, as they are more destructive and reproduce faster.

Step 1: Comprehensive inspection

Remove all stored grains from cabinets and check each item:

• Rice, millet, other grains.
• Flour, noodles.
• Dried fruits, nuts.
• Chinese medicinal herbs, dried goods.
• Pet food.

Seal any infested grain and discard it. Even if infested grain looks edible, its quality is already severely compromised.

Step 2: Sieving

If the grain is still salvageable (light infestation):

• Use a fine sieve to remove adults, larvae, and empty shells.
• Spread the grain out and pick out infested kernels.
• Then freeze (-18°C for 48 hours).
• Or sun-dry for several days.

Step 3: Thorough cabinet cleaning

1. Empty all containers, rinse with hot water, and dry.
2. Vacuum all dust and debris from cabinets.
3. Use a brush for corners and crevices.
4. Wipe interiors with a damp cloth.
5. Allow to dry completely.

Step 4: Chemical treatment

Apply food-grade diatomaceous earth to the following areas:

• Interior walls and shelf seams.
• Inside cabinet doors and edges.
• Baseboards and wall corners.
• Crevices in wooden rice bins.

After application, leave cabinet doors open for ventilation until dry.

Step 5: Airtight storage

Return treated grains to the cabinets:

• Must be stored in airtight jars or sealed bags.
• Freeze new purchases before sealing.
• Ensure all containers have good seals.

Step 6: Regular inspection

Check monthly after treatment. If any stray adults are found, reapply the powder immediately.