Encarsia formosa - Whitefly Parasite – 50 per Card (5000/7500)
Product details
| Management number | 250625499 | Release Date | 2026/09/17 | List Price | US$19.58 | Model Number | 250625499 | ||
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Tidy hang cards for plant-by-plant greenhouse whitefly control
For small to mid-size grows, clean hang cards beat scattering loose scales. These Encarsia formosa cards carry 50 parasitized whitefly scales each and clip directly into the canopy, so the wasps emerge right where they are needed with no debris on your plants. Encarsia is the proven greenhouse whitefly parasitoid, and the 50-per-card density suits tents, rooms, and smaller greenhouses. Available in 5,000 and 7,500 count options.
Live insects ship on Tuesdays only and arrive Wednesday. Orders must be placed 7 days in advance. Anything ordered by 3pm EST Tuesday ships the following Tuesday by UPS overnight shipping.
- Loose scales can leave debris on flowers and fruit
- Hard to place loose scales precisely
- Sprays miss whitefly larvae on leaf undersides
- Whitefly rebuild fast after spraying
- Chemicals leave residue and re-entry waits
- Coverage ends when spraying ends
- Cards keep the release clean and off the crop
- Cards clip exactly where whitefly pressure is
- Wasps parasitize the nymphs where they feed
- Parasitized scales die and produce more wasps
- No residue and no re-entry interval
- Wasps reproduce on site for ongoing control
Right density for smaller grows 50 per card
Each card carries 50 parasitized scales, a density suited to tents, indoor rooms, and smaller greenhouses where a lighter, plant-by-plant placement makes sense.
Clean canopy release
Cards clip into the canopy and release the wasps without loose debris, keeping flowers, buds, and fruit clean, which matters on sensitive crops.
Kills the hidden nymphs
Females lay eggs inside whitefly nymphs on the leaf undersides. The larvae feed within and kill the host at the stage sprays rarely reach.
Gradual emergence
Wasps hatch from the cards over several days, spreading their arrival so coverage does not depend on one single burst.
Two count options
Choose 5,000 or 7,500 total wasps depending on your canopy size and whitefly pressure, scaling the number of cards to fit.
Builds its own numbers
New wasps emerge from parasitized scales, so a repeated card program develops a self-renewing population in the canopy.
Hang the cards in the canopy, shaded from direct sun and drip.
Space them evenly; 50 parasitized scales emerge from each card.
Typical rate 1-10 wasps per m²; repeat until whitefly is controlled.
Keep sticky traps clear of the cards.
How the 50-per-card format clears whitefly
Hang the cards
Clip cards into the canopy across the grow, spaced fairly evenly and shaded from direct light and drip.
Wasps emerge over days
Adult Encarsia hatch from the cards gradually and move to the leaf undersides where whitefly live.
They parasitize the nymphs
Females lay eggs inside whitefly nymphs, which darken and die instead of maturing.
Population renews itself
New wasps emerge from parasitized scales, so repeating cards keeps whitefly suppressed over the season.
- Encarsia formosa cards at 50 scales per card
- 5,000 or 7,500 total count for your chosen size
- Hanging and release instructions
- Insulated overnight packaging
- Density: 50 parasitized scales per card
- Counts: 5,000 or 7,500 total
- Bigger space? the 100-per-card format offers higher density
Questions? We're easy to reach.
Happy Hydro has been serving growers since 2006. Call or email us before you order, after you order, or any time something comes up. When you're happy, we're happy.
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