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Real PhytoFIX

Phytoseiulus persimilis 

Real PhytoFIX (Phytoseiulus persimilis) are predatory mites that feed on two- spotted spider mite (TSM) and other spider mite species. Real PhytoFIX provide excellent control of these pests in a wide range of crops and they are among the most widely used biocontrol agents globally.

Mode of Action

Adult Persimilis feed on all stages of spider mites, eating up to 20 young or 7 adult spider mites per day. Immature Real PhytoFIX feed on the eggs and immature stages of spider mites. Real PhytoFIX are fast-moving pear-shaped mites. The adults are red or orange and the immature stages are clear. Their eggs are oval shaped, twice the size of TSM eggs, and they develop an orange tinge as they mature. At 25°C Real PhytoFIX multiply twice as fast as their prey.


Real PhytoFIX:

  • Applicable in many fields and protected crops
  • Consume more spider mites per day than other predatory mites
  • Eat all spider mite stages
  • Fast development
  • Spread well in the crop
  • Suitable for aerial release.

Real PhytoFIX should be introduced at the first sign of spider mites. If a hot spot is detected early and treated quickly, Real PhytoFIX will follow the pest mites as they spread. If spider mite numbers are already high, consider applying a compatible miticide prior to release.


Real PhytoFIX do well under humid conditions and in crops with heavy foliage. They perform best at 15-28°C and relative humidity above 60%.


Best practice is to apply Real PhytoFIX same day of delivery. If you must store, hold only at 6-8°C for not more than a day.

Seek advice from RealIPM Technical Consultant before introduction. Manage your spray program by looking at the Sensitivity and Compatibility charts. If pesticides are required, always check for side-effects and select products that are least harmful in your IPM program. Use the Biobest Side Effects app or access the Biobest side-effects manual online.