“Preferred food: greenhouse whitefly (Trialeurodes vaporariorum) and limited control of sweet potato whitefly (Bemisia tabaci). Shipment, biology and release: Encarsia formosa Will kill 200 whiteflies per week. The wasp develops inside the whitefly scale and emerges after 20 days. Shipped on strips (5 cards on each strip) that contain parasitized whitefly scale and more than 1,000 Encarsia. Release Wasps at the first sign of whitefly by hanging strips on plant foliage. Release rates: For greenhouse tomatoes and peppers, 1 Encarsia/4 plants weekly for 8-10 weeks; cucumbers, one/2 plants weekly for 8-10 weeks; poinsettias, two/plant weekly, 8-12 weeks. For acre dosage release 3,000 weekly, for 8-10 weeks. Release upon receipt to ensure full potency. Release rates vary depending upon crop, infestation and season of the year. For prevention, use 1 parasite for 10 sq ft. For low infestations (less than 1 adult whitefly per 50-100 plants) release 1 parasite/sq ft weekly for a minimum”