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  Product Information Home » Greenhouse » Biological control » Whiteflies - Biological Control

Eretmix-System: 50% Eretmocerus eremicus and 50% Encarsia formosa 
Poinsettia-Mix-System: 70% Eretmocerus eremicus and 30% Encarsia formosa 

Eretmocerus eremicus and Encarsia formosa wasps will control whiteflies by parasitization and hostfeeding. Whitefly larvae parasitized by Encarsia will turn black whereas those ones attacked by Eretmocerus will change to a beige/light brown color.

Female wasps will lay their eggs under (E. eremicus) or within (E. formosa) the whitefly larvae and a new adult emerges through a round exit hole on the back of the pupa. Depending on species, one female can parasitize on average 150-250 whitefly larvae and both species will kill by hostfeeding on prey. Eretmocerus will parasitize fewer whitefly, but has increased host feeding. At least 98% of the Encarsia are females unlike Eretmocerus that has a sex ratio of about 50:50.

Key Features
  • Parasitoids that control whitefly infestations
  • Effective against both the tobacco whitefly Bemisia tabaci and the greenhouse whitefly Trialeurodes vaporariorum
  • E. formosa is efficient at low temperatures and prefers to parasitize the greenhouse whitefly (3rd and 4th instars)
  • E. eremicus is efficient at high temperatures and prefers to parasitize the tobacco whitefly (2nd and 4th instar)


  • Use immediately upon receipt
  • If not possible, product can be briefly stored at 43-46˚F (6-8˚C)
Item # Description Size
15115 BI Eretmix - 10,000 100/card
17081 Eretmix - 5,000 (No Carrier) 50/card
17088 Eretmix - 10,000 (No Carrier) 100/card
17227 Poinsettia Mix System E - 10,000 (No Carrier)
Tech Sheet
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