From: Plant Protection : Biological Controls
Whitefly Control uses a tiny parasitic wasp (encarsia formosa) and has been used to control whitefly from 1926; supplied as pupae on cards which are simply hung in a shady position throughout the crop, each application of encarsia is supplied on 25 hanging cards with approx 60 pupae on each card making a total of 1500 pupae.
Whitefly Control will be most effective when temperatures are at least 18 degrees C during the day and 10 degrees C at night.
- Open Whitefly Control box in greenhouse
- Always handle cards by top to prevent damaging scales in circle
- When using in tomato and cucumber crops, hang the cards in a shady position among the foliage around 1m below the top of the plant - and space the cards evenly
- For pot plants, again evenly place the cards in a shady position level with the lower leaves but not in contact with the soil
- Regular applications will keep whitefly under control
- Use within 18 hours of receipt and keep outer box in cool place (between 5-10 degrees C)
- Never leave box, or place cards, in direct sunlight
- Remove sticky traps before introducing predator