Encarsia formosa | Whitefly Control
Target Pests
Cotton, greenhouse, silverleaf, sweet potato, and other whitefly species.
Product Description
These tiny parasitic wasps are nearly invisible without magnification. They target whitefly nymphs and pupae, laying eggs inside them to stop the next generation before it starts. Parasitized nymphs turn a telltale black within 10–14 days, an easy way to confirm it's working. Pair with Eretmocerus eremicus for maximum control, and add Delphastus catalinae for a full-spectrum approach. Delphastus won't feed on nymphs already parasitized by Encarsia.
Introduction Rates
Release 1 insect per sq. ft. (or 1–5 per infested plant), every 1–2 weeks, at least 5 times
Temperature range: 63–95°F with 50–70% humidity.
Rates are general guidelines. Actual needs vary by pest species, plant, and infestation level. Monitor both pests and released insects to gauge success.
Application
- Introduce during cooler parts of the day (morning or evening).
- Hang cards on lower leaves, out of direct sunlight and away from moisture.
- Leave cards in place for at least 21 days to ensure full emergence.
Pro Tips
- Remove yellow sticky traps at time of release.
- Avoid broad-spectrum or systemic pesticides, which are toxic to these parasitoids.
- Best introduced immediately upon receipt. If needed, store up to 24 hours at 45–55°F, out of direct sunlight. Never freeze.