A system of feeding, culturing and harvesting insects, particularly black soldier flies comprises of a semi-enclosed barrel including a generally cylindrical sidewall having two ends and a central axis of rotation oriented roughly transversely to the direction of gravity, and a migration path attached to one or both ends of the barrel for the exit of mature larvae. A method of raising insect larvae and byproducts comprises of inserting larvae or eggs into a bin comminuting and inserting food material into the interior of the bin aerating the larval/food mass by rotating the bin about a central axis that is positioned roughly transverse to the direction of gravity draining leachate from the bin into a collection system and providing a migration path for the egress of mature larvae on at least one end of the bin into a larval collection system.
