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Encarsia formosa
Whitefly parasitoid


Target Pests

Greenhouse whitefly


Crops suitable

Field and green house vegetables, cut flower and nursery crops.


Tiny parasitic wasp with orange coloured abdomen and black head and thorax. Lays its eggs into second, third and fourth nymphal stages of whitefly.

The encarsia egg then hatches inside the whitefly scale and the wasp larva feeds inside the scale.

The scale will turn black within two weeks and a wasp will emerge soon after.

How to use

Supplied on cards each containing 100+ parasitised white fly scales.


Hook the cards onto a plant twig or on support wires etc.


Release rates







Protected crops:

Make weekly applications for 6 consecutive weeks of

2,000 parasites per 1,000 m2.


Field crops: inoculatively applications of 2,000-5,000 per hectare.



Other biocontrol agents commonly used with Encarsia:


Detailed descriptions and instructions for use are provided in

The Good Bug Book - Second Edition Available from good bug suppliers

Or view or download a PDF file of the Book entry for Encarsia.


┬ęDenis Crawford/Graphic Science

┬ęDenis Crawford/Graphic Science