Encarsia formosa

FEED ON:Greenhouse Whitefly, Sweet Potato Whitefly and Silverleaf Whitefly.

500 Insects (Eggs) 250 sq. ft.
1,000 Insects (Eggs) 500 sq. ft.


RELEASE RATES: Note -  Note - These rates are for preventative control only, multiple releases and/or higher quantities are necessary for heavier infestations. 

DESCRIPTION: Encarsia formosa is a tiny parasitic wasp that parasitizes whiteflies. Adults are black with yellow abdomen, less than 1 mm (1/20 inch) long (they do not sting). Optimum conditions are temperatures over 68°F and relative humidity 50-70%.

Encarsia should not be used if high whitefly populations are already established. 

LIFECYCLE: The complete life cycle takes about 28 days.  Adults are most active for about 10 days, although they can live up to 30 days.

RELEASE INSTRUCTIONS: Encarsia pupae are sold glued onto cards. It is important to hang the cards from lower leaves in the shade as Encarsia tend to fly upward; avoid wetting them while watering. Adults will emerge from the pupae over a period of 1-2 weeks. If necessary, the Encarsia can be held for up to 2 weeks at 40°-50°F, however the percentage of emergence will decrease with time. Once you have made it home with your Encarsia, place the cards with their eggs in the infestation area upon receiving your package. Hang the individual cards or strips in shaded locations so they are evenly distributed throughout the infested area. Whitefly parasites will emerge from the black host eggs over a period of 2 weeks and will  seek out and parasitize immature whitefly.