Even when you don't see mites in the cultures, they are present and the best sign may be at the base of the cups on the mite paper..
The brown dust is dead mites. I run my cultures out to 30 days and typically have fly production up until I wipe out the culture.
This is what mites on mite paper will look like.
The brown dust is dead mites. I run my cultures out to 30 days and typically have fly production up until I wipe out the culture.
This is what mites on mite paper will look like.
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