I've had this happen and continue to check out my malt storage come summer time here in Aus.
Freezer did the trick for me Zambezi but still couldn't help thinking about them bastard bugs in my mash lol!
Keep an eye out on your stock.
Stored product pests are a bugger to get rid of once established.
Your wevels or grain Beatles are there at your place.
Maintain good housekeeping around your grains sweep up any spilled grains keep all grains including your rice oats ect sealed up in approved containers.
And a bay leaf don't go astray .
Freezer did the trick for me Zambezi but still couldn't help thinking about them bastard bugs in my mash lol!
Keep an eye out on your stock.
Stored product pests are a bugger to get rid of once established.
Your wevels or grain Beatles are there at your place.
Maintain good housekeeping around your grains sweep up any spilled grains keep all grains including your rice oats ect sealed up in approved containers.
And a bay leaf don't go astray .