Amblyseius Cucumeris Slow-Release Prevention Sachets
10% off your first 4 orders, then 15% off every order after.
Bulk sachet discounts still apply to repeat orders — even if your cart doesn't show them.
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.
Amblyseius Cucumeris Slow-Release Prevention Sachets
At A Glance
Cucumeris for Thrips & Mite Prevention
Thrips don’t show up all at once. They creep in quietly, settle into leaf folds, and multiply long before visible damage appears. Cucumeris Sachets are designed for exactly that moment—before a problem becomes a spiral.
Each sachet contains Amblyseius cucumeris, a proven predatory mite that feeds on thrips larvae and other microscopic pests. The mites reproduce inside the sachet and release gradually over several weeks, providing steady, preventative control where pests actually live.
This is long-game biological control. No sprays. No residue. No disruption to your plants or your space.
What Cucumeris Targets
Cucumeris is most effective against early-stage pests, especially:
Thrips (larval stages)
• Western flower thrips
• Onion thrips
• Greenhouse and ornamental thrips
Also feeds on:
• Broad mites
• Cyclamen mites
• Early spider mite stages
For active or heavy spider mite infestations, pair with a dedicated spider-mite predator.
For aggressive broad or russet mite pressure, use a specialist predator alongside cucumeris.
When to Use Cucumeris Sachets
Cucumeris works best when pests are expected, just beginning, or historically recurring.
Recommended for:
• Preventative thrips control
• Early detection scenarios
• Dense or layered foliage where pests hide
• Plants that are hard to spray evenly
• Growers who want sustained, low-maintenance protection
Active infestation?
Sachets are prevention and support—not a standalone knockdown. For curative control, pair sachets with cucumeris bottles and/or Orius. Apply bottles directly to hotspots while sachets maintain coverage over time.
How It Works
• Mites reproduce inside the sachet
• New predators exit gradually through a pre-made hole
• Multiple generations release over several weeks
• Predators spread through foliage and feed continuously
You won’t see them—and that’s normal. At ~0.5 mm, cucumeris mites are smaller than a grain of sand. If other beneficials in your system are alive, cucumeris is too.
Lifecycle & Feeding Behavior
• Eggs hatch in 2–3 days
• Larvae do not feed
• Nymphs and adults actively hunt
• Adults consume 1–5 prey per day
• Lifespan averages ~20 days
• Females lay 2–3 eggs per day under optimal conditions
This overlapping lifecycle is what allows sachets to provide sustained control instead of a one-time release.
Release Rates & Placement
Preventative:
• 1 sachet per plant
• Replace every 4 weeks
Curative support:
• 1–2 sachets per plant
• Replace every 3 weeks
• Always pair with bottle releases
Placement tips:
• Hang in shaded, sheltered spots
• Avoid direct sun and heat
• Do not open sachets
• Use the cardboard strip for handling
• Tear along perforations when installing
Best Conditions for Performance
• Temperature: Active from 59–77°F
• Optimal range: 68–77°F
• Humidity: 70%+ preferred
• Peak reproduction around 77°F
Compatibility Notes
• Allow oils or soaps to fully dry before release
• Do not combine with other generalist predatory mites
• Compatible with most IPM programs when applied correctly
If you’re unsure about pesticide compatibility, check a current beneficial-insect compatibility chart before application.
Product Details
• Species: Neoseiulus cucumeris
• Pack size: 500 sachets
• Count: ~250 predatory mites + prey mites per sachet
• Sachet type: Paper-based PLUS sachet
• Carrier: Bran
• Appearance: White sachets with exit hole
• Mites are beige, fast-moving, and extremely small
Sustainability & IPM Value
Cucumeris sachets replace repeated chemical sprays with living predators that work continuously. They reduce pesticide use, protect beneficial insects, and support long-term ecosystem balance—indoors or out.
What to Expect After Release
• Mites begin dispersing immediately
• Pest pressure declines gradually
• Protection lasts several weeks
• Reapply based on monitoring and plant density
This is prevention done properly—not a panic fix.
Frequently Asked Questions
Can I store sachets for later use?
Short-term refrigeration is acceptable up to the expiration date (typically ~1 month from shipping). Apply as soon as possible for best results. Always allow sachets to reach room temperature before use.
Will I see the mites?
Probably not. Cucumeris mites are microscopic. Their effectiveness shows up as reduced pest pressure—not visible movement.
Are cucumeris sachets safe indoors?
Yes. Safe for people, pets, and plants. Ideal for homes, offices, greenhouses, and interiorscapes.
Do sachets contain adult mites?
Yes. Sachets contain a mix of eggs, juveniles, and adults.
Can I use this on tomatoes?
Yes. Cucumeris performs well on tomatoes and can navigate their leaf structure. For spider mites on tomatoes, pair with a specialist predator.
Does cucumeris eat anything else?
It primarily targets thrips larvae and small mites, with some supplemental feeding depending on conditions.
Target Pests
Environmental Needs
Selection Guide
How to Use
How They're Shipped
Hang them up, then wait.
How to deploy your sachets, and how to read the results over the next few weeks. Sachets are prevention — a slow-release nursery that ramps up over weeks, not a quick knockdown for an active outbreak.
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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 sachets somewhere room-temperature (60–75°F) and out of direct light — they'll keep for a day or two.
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02
Don't open the sachet
Each sachet is a self-contained breeding colony. The mites and their food source live inside; they emerge gradually through a small exit hole on the breathable face. Cutting the sachet open ends the slow release and dumps the colony all at once. Keep them sealed.
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03
Hang or place near the plant
Hook each sachet on a sturdy branch, hang from a stake, or set near the base of the plant — out of direct sun and away from anywhere it'll get watered. Mites travel from the sachet onto the plant on their own. One sachet protects roughly 2–3 feet of canopy; see the product description for exact spacing.
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04
Leave them alone for 4–6 weeks
Predator emergence ramps up over the first two weeks, peaks around weeks three to four, and tapers off through week six. You won't see the predators (they're smaller than a grain of salt), and an "empty-looking" sachet at week one means nothing. The real signal is what isn't happening — pests not establishing on protected plants.
Something visibly wrong on arrival?
Sachets that arrived torn, soaked, or with a sour smell — take a photo and email info@fgmnnursery.com within 24 hours of delivery with your order number. We'll replace or refund without question.
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.
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.
I already have Thrips damage. Will this fix it?
Will they kill adult Thrips?
Why use sachets instead of a bottle?
How do I know they are working?
Do I need to feed them?
What about the Thrips in the soil?
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.
Mite Matters
Cucumeris: Why It Works (and Why It Fails)
Cucumeris is reliable, widely researched, and genuinely effective — within a specific set of conditions. Here's what it actually does, what it won't do, and how to tell if it's the right species for your situation.
My Plant Has Webbing. Help.
Webbing on a plant isn't always spider mites — and the mite that causes the most damage indoors doesn't produce webbing at all. Here's how to tell what you're actually looking at before you treat.
Native vs Invasive Ladybugs
Most ladybugs you'll encounter are red with black dots — and that description fits native, introduced, and invasive species equally. Here's how to actually tell them apart, what the harlequin ladybug has been doing to native populations, and where the real ecological concerns are.