TControl Whitefly with the Encarsia Wasp.
They are tiny parasitic wasps which lay eggs in the whitefly scale.
The Encarsia larva kills the scale which turns black before a adult Encarsia emerges.
Supplied on cards which are simply hung in the plants.
Repeat applications are advisable if the problem is severe.
Use regular introductions between April and August for effective control.
Quantity per pack 1.