Magister SC is a new tool to fight Mites and Bemisia Whitefly

As growers are continuously battling new pests, as well as old nemeses, any new tool is a welcome addition to the pesticide toolbox.

The Pest Management Regulatory Agency recently registered an interesting new product: Magister SC (fenazaquin), which is a miticide, insecticide, and fungicide.

Although registered against powdery mildew in some crops, only the miticide/insecticide use pattern is allowed in greenhouse ornamentals. More information on this product is available below.

Information to Know about Magister SC for Floriculture:

  • It’s registered against spider mites, as well as European red mites and others. It is also registered against sweet potato whitefly (Bemisia tabaci).
  • It’s a Group 21 insecticide – this is in the same chemical class as Fujimite (fenpyroximate) and DynoMite (pyridaben).
  • Magister SC should not be used within the same pesticide rotation program as Fujimite and DynoMite to prevent the development of pesticide resistance in spider mites and whitefly. (Note the use of DynoMite is being phased out – last date of use is October 2024).
  • It is NOT for use on cut flowers.
  • Provides control of eggs by contact and controls immature and adult mites by both contact and ingestion.
  • REI – 12 hours.
  • Moderately (3) hard to hard (4) on most beneficial insects, including predatory mites, with a 3-week persistence.


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