Neoseiulus fallacis | Catch Mites in Hibernation (Cooler Climates)

Early-Season Spider Mite Control Spider mites don't wait for warm weather to start their spring buildup — by the time daytime temperatures climb, colonies are already emerging from winter dormancy with a head start. Neoseiulus fallacis closes that gap by staying active in conditions too cold for the pests it targets, catching them before they're even out of hibernation. Ideal for outdoor gardens, orchards, and field crops in cooler regions, fallacis is a proven early-season IPM tool with a long track record in commercial agriculture. What Are Predatory Mites? Neoseiulus fallacis shares the same aggressive, fast-feeding temperament as its relative Neoseiulus californicus — both are considered Type II predators. What sets fallacis apart is its cold-weather survival strategy: it overwinters in soil and cover crop, entering diapause (a hibernation-like dormant state) at lower temperatures than the pest mites it hunts. That timing edge makes it especially effective for mid-spring release, when it's already active while target pests are still dormant. As a Type II generalist, californicus can sustain itself on pollen when pest populations are low — a flexibility Type I specialists like persimilis don't have. What Pests do Fallacis Mites Target? Targets two-spotted spider mites, European red mites, clover mites, broad mites, Banks grass mite, spruce spider mites, southern red mites, six-spotted mites, carmine mites, Pacific mites, rust mites, privet mites, cyclamen mites, and many other pest mite species. How It Works Fallacis predators are identified by eight legs and a pear-shaped body in varying brownish-red hues. They survive winter by sheltering in plant crevices, then emerge to lay spherical, transparent eggs near pest populations. Larvae progress through two nymphal stages, gradually developing four pairs of legs while preying on larger spider mite nymphs, until reaching adulthood. When to Use Fallacis Mites Fallacis is built for early timing. Release it in mid-spring, before pest populations have broken dormancy, for a genuine head start on the season. It pairs naturally into early preventative IPM programs alongside soil-dwelling predators like Hypoaspis miles (Stratiolaelaps scimitus), covering both foliage-level and soil-level pest activity while temperatures are still cool. Fallacis vs. Californicus Both are Neoseiulus species and both are Type II generalists, but they split along humidity preference rather than temperature: Neoseiulus fallacis: prefers higher humidity (55–90% RH), cold-active, catches pests while they're still in winter dormancy Neoseiulus californicus: tolerates a wider humidity range but performs best at the lower end (40–60% RH), stronger fit for hot, dry conditions If your growing environment runs humid, fallacis is the better cold-season fit; if it runs dry and hot, californicus takes over. Application Rates These are general starting points — actual application should be adjusted based on pest species, plant type, and infestation severity. Monitor pest and predator populations regularly to gauge how well the program is working. Bottled Mite Release Application Rate Frequency  Light Infestation 1-2 mites per sq. ft. Weekly or bi-weekly Heavy Infestation 2-4 mites per sq. ft. Weekly or bi-weekly   Temperature & Humidity Range Effective range: 50°F – 90°F Humidity: 55-90% Application Instructions Release early morning, evening, or when grow lights are off Knock down any webbing on infested foliage first Mist leaves lightly before releasing predators Sprinkle bottle contents directly onto plants, or use hanging boxes to keep predators concentrated in target zones. Leave the open container in place for 72 hours so any remaining predators can disperse Repeat every one to two weeks until the infestation is under control Pairing for Full-Spectrum Mite Control For heavier spider mite pressure, pair fallacis with Stethorus punctillum, a predatory beetle with a large appetite that also feeds on aphids, or Feltiella acarisuga, a flying predator of spider mites that reaches areas ground-based predators miss. For early-season soil coverage, pair with Hypoaspis miles as noted above. Safe, Sustainable Pest Management 100% natural — no chemical residue Safe around people and pets Safe for use on edible crops Fits seamlessly into existing IPM programs Requires no protective equipment Storage For best results, release immediately upon arrival. If short-term storage is unavoidable, keep at 45–55°F for no more than 24 hours, out of direct sunlight. Never freeze.