Amblydromalus limonicus
Biological control is a programme, not a single release. A subscription puts the next one on its way before the last one runs out.
Skip a box, change how often it comes, or stop it — all from your account.
Heads up—this is just an estimate. We only ship when the bugs are happy and ready to travel (Mon–Thurs). If a colony needs a beat to peak, or we're propagating a fresh batch, your order might hold up to a week. Treatment bottles jump the line when you've got an active infestation.
Sizing guide
How our sizes work
Sizes are set by how many plants you are treating — not by how much material is in the container.
Every size on every product page names its own coverage right there in the dropdown, so you never have to come here to find a number. Medium — Up to 25 Plants (2,500 Mites) tells you the tier and the count in one line. This page is for the part the dropdown cannot tell you: how to pick between two of them.
These are rough middles. The ladder runs smallest to largest within each product, so a Medium of one species covers more ground than a Medium of another — a nematode drench and a beetle release are not the same job. The count on the size you are looking at is always the real answer.
Pest pressure moves you up the ladder
Plant count is only half the sum. The other half is how much pest is already there. A closed tent holding fifteen plants with thrips on every growing tip needs a larger release than a bright room holding forty plants with a few gnats — the population you are outnumbering is bigger, and the enclosed space lets it rebound faster.
Coverage figures assume a typical active infestation. Adjust from there:
Under heavy pressure, two releases beat one large one. Take the larger size and plan a second release 7–14 days later, which catches the eggs that had not yet hatched the first time.
A few things work differently
A few products read in square feet rather than plants, because that is how they are applied — the outdoor and area-scale releases. Those are Sc and Hb nematodes, and the aphid specialists Ervi, Matricariae, and Aphidoletes. Same ladder, different unit.
Sf nematodes and Triple Blend size by plants and pots, like everything else. They are soil drenches for potted plants, so count your pots rather than your floor.
Slow-release sachets have no size. They are sold by the sachet, and you place one per plant or one per few plants depending on pressure. Sachets are a prevention tool — they hold a population in place before a problem starts. If something is already established, a bottle is the correct answer.
Sizing up is cheaper than sizing twice. Predators need enough prey to establish and enough of themselves to find it. Underdosing is the most common reason a release underperforms, and it usually costs more in the end than the larger size would have. When you are between two sizes, take the larger one.
Still not sure? Tell us what you are growing and what you are seeing, and we will size it for you.
Amblydromalus limonicus
At A Glance
Amblydromalus limonicus is the apex predator of the commercial greenhouse world. While other mites like Swirskii or Cucumeris are reliable workhorses, Limonicus is a glutton. It is the only predatory mite that aggressively feeds on both Whitefly and Thrips at high rates, while also consuming Spider Mites. In the one study that ranked seven species on a single protocol it came out top — though the margin over Cucumeris was 6.9 against 6.0 thrips larvae a day, which is closer than the trade tables suggest. Where it genuinely pulls ahead is whitefly and establishment: 99% whitefly reduction against Swirskii's 88% in one greenhouse comparison, and it matched Swirskii's population at a quarter of the release rate. If you have a high-value crop and need the strongest possible protection against a mixed infestation, Limonicus is the premium choice.
Field Notes
Amblydromalus limonicus
Bottle
The animal
What it eats
What arrives
Where it works
Running it
The long version
- Two of These Four Columns Are Guesses.The four-species comparison, checked against the primary literature.
- Six Stages. It Reaches One.Which thrips stages a predatory mite can actually reach.
Target Pests
Environmental Needs
Selection Guide
How to Use
How They're Shipped
Deploy day, and the weeks after.
How to deploy your order, and how to read the results over the next few weeks.
-
01
Open the box right away
Bring the package indoors as soon as it arrives. Don't leave it on a hot porch, in a cold mailbox, or in direct sun. If you can't deploy immediately, set the bottle somewhere room-temperature (60–75°F) and out of direct light — it'll keep for a day or two.
-
02
Let the bottle rest 15 minutes
Mites huddle in transit for warmth. Set the bottle somewhere room-temperature for fifteen minutes before you open it. This lets them spread back through the carrier and warm up before deployment.
-
03
You probably won't see them
Predatory mites are smaller than a grain of salt. Most people can't spot them with the naked eye, and phone cameras can't focus close enough to catch them. That's expected! What you can check: the carrier material should look dry and uniform, the bottle should be intact, and there shouldn't be visible mold. A warm box is normal — don't read anything into it.
-
04
Deploy the same day
Apply in the evening or on a cloudy day to avoid UV exposure. For pests on the plant — spider mites, thrips, broad mites — sprinkle the carrier material directly onto leaves and stems where damage is visible. For soil-dwelling pests like fungus gnats, sprinkle onto the top inch of soil and lightly water afterward to help the mites settle into the medium. Either way, spread across plants instead of piling in one spot. See the product description for species-specific dosing.
-
05
Watch your plants over 1–2 weeks
The real "are they working" check isn't visual. It's whether your pest population drops. Bottled treatments typically show measurable reduction in spider mites, thrips, or other targets within one to two weeks. If pest pressure isn't easing by then, that's when to bring in our bug pros.
Something not quite right?
Reach out to our entomologist by filing a report within 72 hours of delivery, with your order number and a photo. Candidly, without a photo the team can't approve a live beneficial claim.
Read the full Live Delivery Guarantee →Join Karen's Live Shows — Pests, Plants & Predators on PalmStreet.
Every Friday at 7pm EST — plus additional shows throughout the week. Ask your pest questions in real time — we answer everything.
The Weekly Newsletter
A weekly excuse to be weird about bugs at parties.
Weekly dispatches on the quietly alarming things happening in your soil. All of it real.
No spam. Leave whenever.
You're in
The first strange true thing arrives next week.
FAQ
What is your Live Delivery Guarantee?
We guarantee that your beneficial insects arrive healthy and ready to work. They're living things, so we pack for the season and ship expedited to give them the best trip we can.
If something looks wrong when the box opens, take a photo and file a report within 72 hours of delivery, with your order number. Photos matter: candidly, without them the team can't approve a live beneficial claim.
Why is Limonicus more expensive than Swirskii?
Will it eat Spider Mites?
What if my humidity drops?
Can I use it on Roses?
Does it bite humans?
How do I apply them without getting bran in my pots?
Help! I'm overwhelmed
Yeah, it's a lot the first time you're using predatory mites. File a report and our bug pros will walk you through it!
I don’t see anything moving in my bottle or sachet. Does that mean they’re dead?
Not at all! In fact, go ahead and deploy them.
Predatory mites are microscopic (often less than 0.5mm) and naturally blend into their carrier medium (bran or vermiculite).
- For Bottles: The mites often huddle in the center of the bottle for insulation during transit.
- For Sachets: These are "slow-release" nurseries. The mites stay tucked deep inside the breeding media and emerge one by one over 2–4 weeks. Seeing an "empty-looking" sachet or bottle is not proof of a loss; it is simply how they are packaged for maximum survival.
Mite Matters
Thrips Have Six Stages. Cucumeris Reaches One.
A thrips passes through six life stages and cucumeris can kill one of them. Second instars do not just survive the attack — they fight it off, and they destroy the predator's eggs on the way past. That single fact explains the lag, the reservoir, and most of the disappointment.
Four Predatory Mites, Compared. Two of the Columns Are Guesses.
Every supplier prints the same four-column comparison table. We went and read the papers behind each cell. One column rests on unpublished company data, one species has never been trialled against thrips at all, and the humidity row is backwards. Here is that table with the guesses marked.
Your Cucumeris Are Alive. Your Thrips Are Winning.
Your mites are alive. Your thrips are also alive. That combination has twelve documented causes, and what the mites are doing — where they are, what they are sitting next to — narrows it to one or two in about five minutes.