Provisional Advice
Set out 4000 slow-release bags of A.swirskii per hectare among the parent plants. If A. swirskii does not establish itself in the crop, this introduction must be repeated every six weeks.The predatory mite population may remain at a stable level better if spent flowers are left at regular intervals within the crop in order to supply the predatory mites with pollen as an alternative source of food.
Extra A. swirskii can be released into the crop by means of shaker cans to protect vulnerable plant varieties.
Release P. persimilis on a regular basis, especially in hot-spots.
Depending on the type of whitefly in the crop, the parasitic wasps Encarsia formosa, Eretemocerus eremicus or Eretmocerus mundus will also need to be released.
The combination of the predatory mite A. swirskii, which predominantly targets the eggs and crawlers (first larva phase) of the whitefly, and the parasitic wasps, which concentrate on the second, thirds and fourth larva phases of the whitefly, is effective because the two elements complement each other well.