Predatory Mites for Fungus Gnat and Thrips Treatment

Stratiolaelaps scimitus 

Predatory mites are one of the most effective biological tools for managing fungus gnats and soil-stage thrips, and Stratiolaelaps scimitus is designed to work where many common treatments fall short—below the surface.

Stratiolaelaps scimitus is a soil-dwelling predatory mite that hunts pests in soil, substrate, and bedding. It targets fungus gnat larvae, thrips pupae, and other root-zone pests at the life stages that sustain infestations. It is also one of the few biological controls with documented use against snake mites in reptile enclosures.

Rather than addressing only what’s visible above the soil, this predator focuses control where pests actually develop.

What This Product Treats

Stratiolaelaps scimitus is used for soil-stage and substrate-based pest pressure, including:

Pest Coverage by Life Stage

This predatory mite is most effective when pests are breeding in soil or bedding rather than feeding openly on foliage.

Why Use This Predatory Mite

Most control methods focus on adult pests or surface activity. Stratiolaelaps scimitus addresses the earlier stages that allow populations to persist.

It moves through soil and substrate to locate prey, feeds directly on developing pests, and reproduces in place as long as conditions remain suitable. Over time, this creates sustained biological pressure that interrupts pest life cycles rather than masking symptoms.

Because it works within the growing medium itself, it can be especially useful in setups where sprays, drenches, or surface treatments are ineffective or undesirable.

Best Use Cases

Stratiolaelaps scimitus is commonly used in:

• Houseplant collections with recurring fungus gnat issues

• Grow tents and greenhouses using organic or moisture-retentive media

• Reptile enclosures where snake mites need to be addressed without chemicals

• Propagation and seedling areas

• Living soil and no-spray growing systems

• Poultry or aviary bedding in appropriate environments

How to Use

• Sprinkle mites directly onto the soil surface of each plant

• In reptile enclosures, apply directly to bedding while avoiding direct contact with animals

• Predatory mites will move through soil or substrate to locate pests

• Avoid pesticides, soil drenches, oils, or sprays before and after release

Keeping soil lightly moist (not wet) for the first one to two weeks helps support establishment.

Follow-up applications may be useful in environments with ongoing or recurring pressure.

How Much Do I Need?

Each option is dosed based on average container-grown plants, using a typical 6-inch pot as a reference point.

• Smaller pots, propagation trays, or clustered plants are fully covered at the labeled plant count

• Larger pots, deeper soil, or consistently damp media may benefit from sizing up

• For early or light issues, using a lower size is usually sufficient

• For extreme pest pressure, choosing the next size up is often the safer choice

How These Predatory Mites Work

Stratiolaelaps scimitus establishes ongoing biological pressure as long as moisture and temperature remain within a workable range.

Females lay eggs directly in soil or substrate. Eggs hatch within one to two days, and juveniles mature into active hunters in about a week. Adults continue feeding and reproducing for several weeks, allowing control to persist as new pests emerge.

What This Does Not Treat

This product is intended specifically for soil and bedding pests. It is not appropriate for:

• Adult thrips on foliage (use Orius)

• Spider mites (use Ultimate Blend Mite Mix)

• Aphids above the soil line (use Ladybugs or parasitoids)

• Mealybugs (use Cryptolaemus Montrouzieri)

Matching the predator to the pest—and to the correct life stage—is essential for effective biological control.

Storage & Shipping

• Ships under live delivery guarantee

• Use immediately upon arrival when possible

• If short-term storage is needed, keep at 45–55°F for up to 48 hours
  

Clean Biological Control

• Leaves no chemical residue

• No re-entry interval

• Suitable for indoor growing environments

• Compatible with living soil systems

Stratiolaelaps scimitus is appropriate when fungus gnats, soil-stage thrips, or snake mites are developing out of sight and control needs to occur at the source rather than on the surface.