I have an account that has maggots in the cracks of the concrete next to the building. The maggots are in the hundreds. The compactor is in the same area. I have treated the crack with a microencapsulated product which did not work. I have not dealt with this issue before and do not know where to go from here. Some guidance in the treatment would be greatly appreciated.
I'll go with the fact that these are, indeed, maggots, and thus probably from blow flies. I have also seen some great images of a rare phenomenon where thousands of small fly larvae of fungus gnats are migrating en masse out from under a concrete slab, perhaps heading off to a better place to pupate. But, this is pretty unusual and these larvae are far smaller than your typical maggot.
Mr. Pest Control
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