Vermiculite is a flaky clay mineral ... Perlite, too, comes in fine to coarse grades. The disadvantages of perlite include its fluorine content, which could be detrimental to plants sensitive ...

Of three media tested (coarse and fine vermiculite, and parafilm cones) for harvesting F. orizabensis pupae in cocoons, parafilm cones were most easily harvestable from colonies, and 44% of deployed ...