Coleomegilla maculata Larvae (Pink Spotted Lady Beetle)
10% off your first 4 orders, then 15% off every order after.
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, Coleomegilla, 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.
Coleomegilla maculata Larvae (Pink Spotted Lady Beetle)
At A Glance
Most ladybugs you buy have one job and one flaw. They eat aphids, and then they leave. The dispersal flight is hardwired — they wake up after dormancy with one instinct, and it isn't loyalty.
The larvae don't have that problem. They can't fly. They hatch, they walk, and they spend their entire larval life prowling the same plant you put them on, eating more or less constantly. By the time they grow up, they've already decided this is home.
Coleomegilla maculata is North American and refreshingly un-fussy about its diet. It takes aphids, thrips larvae, whitefly, small soft-bodied pests, and a range of insect eggs — and, unusually for a lady beetle, it also eats pollen. That's the part worth caring about: a generalist that doesn't bail the moment pest pressure drops. When the aphids thin out, it stays fed instead of moving on, which is exactly the behavior you want from something you're counting on to stick around.
It is not a spider mite solution. It'll take a mite if one wanders by, but if mites are your problem, that's a different aisle.
Larvae are enthusiastic about food and indifferent about whose food it is, so crowd them and they'll start eating each other. Spread across the planting, they'll work it methodically.
Field Notes — Coleomegilla maculata (Larvae)
| Species | Coleomegilla maculata |
| Common name | Pink spotted lady beetle, twelve-spotted lady beetle |
| Native to | North America |
| Ships as | Larvae |
| Sold by | Count |
| Size on arrival | 2–8mm depending on instar — dark, elongated, alligator-shaped. They look nothing like a ladybug |
| Hunts | Aphids — all species, all stages. This is what they search for and what they'll clear |
| Eats opportunistically | Thrips larvae, spider mites, whitefly nymphs, mealybug crawlers, scale crawlers, moth and beetle eggs, other soft-bodied insects small enough to handle. Taken on encounter, not sought out |
| Also eats | Pollen. Sustains larvae through gaps in prey and lets them keep working a plant that's been mostly cleared |
| Won't touch | Adult scale, adult mealybugs under wax, anything armored, fungus gnat larvae in soil, root pests |
| Feeding window | The entire larval stage, roughly 10–14 days at room temperature |
| Larva to adult | Pupates on foliage after the final instar; adults emerge in about a week |
| Optimal temp | 65–85°F (18–29°C) |
| Humidity | Moderate — no minimum RH requirement |
| Mobility | Walk only. They can't fly, so they stay on the plant you place them on |
| Deploy | Immediately on arrival. Larvae are actively feeding and can't be held |
| Release | Directly onto infested foliage, near the prey. Evening, onto moist leaves |
| Refrigerate | No |
| Establishes | Not from a larval release on its own — adults emerge, disperse, and may lay if prey and pollen are present |
| Compatible with | Predatory mites, lacewings, Aphidius, Cryptolaemus, beneficial nematodes, springtails, Stratiolaelaps scimitus |
| Keep separate from | Broad-spectrum insecticides; observe the label interval before release |
| Safe around | Pets, children, plants |
Target Pests
Environmental Needs
Selection Guide
How to Use
How They're Shipped
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FAQ
What is your Live Delivery Guarantee?
We guarantee that your beneficial insects will arrive healthy and ready to work. Because we are shipping live organisms, we use packaging and expedited shipping to ensure their safety. In the rare event that your order is compromised during transit, please take a photo of the package and contact us within 24 hours of delivery so we can make it right.
Will they fly away like regular ladybugs?
What do they actually eat?
Will they handle my spider mites?
Why do I have to spread them out so much?
Can I keep them in the fridge until I'm ready?
The larvae look kind of alarming. Is that normal?
Help! I'm overwhelmed
Yeah, it's a lot the first time you're using predatory mites. Please email us at info@fgmnnursery.com and we'll be happy to help!
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.
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