''Stratiolaelaps scimitus'' (formerly ''Hypoaspis miles'') is a small (0.5 mm) light brown mite that lives in the top layer of soil. As a natural

predator Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill th ...

of fungus gnat

pupa A pupa ( la, pupa, "doll"; plural: ''pupae'') is the life stage of some insects undergoing transformation between immature and mature stages. Insects that go through a pupal stage are holometabolous: they go through four distinct stages in thei ...

e and of the

snail A snail is, in loose terms, a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name ''snail'' is also used for most of the members of the molluscan class G ...

parasite Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson has ...

'' Riccardoella limacum'' it is used by gardeners and snail breeders for biological pest control. ''Stratiolaelaps scimitus'' is also commonly used by reptile, amphibian and invertebrate keepers as a preventative or reactive measure against grain mites and reptile mites. Whereas most mite treatments are based on synthetic chemicals, predatory mites are used as a biological method of preventing and curing mite infestations. ''Stratiolaelaps scimitus'' and the similar species, ''S. aculiefer'' are soil-dwelling, predatory mites. ''Stratiolaelaps'' mites feed on fungus gnats,

springtail Springtails (Collembola) form the largest of the three lineages of modern hexapods that are no longer considered insects (the other two are the Protura and Diplura). Although the three orders are sometimes grouped together in a class called Ento ...

thrips Thrips (order Thysanoptera) are minute (mostly long or less), slender insects with fringed wings and unique asymmetrical mouthparts. Different thrips species feed mostly on plants by puncturing and sucking up the contents, although a few are ...

pupae, and other small insects in the soil. The mite is long and light-brown in color. It inhabits the top layer of soil. Females lay eggs in the soil which hatch into nymphs in 1 to 2 days. Nymphs develop into adults in 5 to 6 days. The lifecycle takes approximately 7 to 11 days. Both nymphs and adults feed on soil-inhabiting pests, consuming up to 5 prey per day. They may survive by feeding on algae and/or plant debris when insects are unavailable. Both males and females are present, but males are smaller and rarely seen. ''Stratiolaelaps'' is well adapted to moist conditions in greenhouses in a variety of growing media, but does not tolerate standing water. ''Hypoaspis'' is currently used in greenhouses for control of fungus gnats. It feeds on fungus gnat eggs and small larvae and is most effective when applied before fungus gnat populations become established or when populations are low. It has been successfully used in bedding plant production, potted plants, and poinsettia stock plants. ''Stratiolaelaps'' will also attack thrips pupae in the soil, but cannot be relied on alone for thrips control in a commercial greenhouse. It may, however, enhance biological control when used in conjunction with predators feeding on thrips on the foliage. In small-scale experiments this mite reduced emergence of adult thrips to about 30% of that in controls.

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Using ''Hypoaspis miles'' to rid snails and slugs of pests such as ''Riccardoella limacum''
{{Taxonbar, from=Q5959164 Laelapidae Biological control agents of pest insects Animals described in 1892