BeneficialBroad mite

Amblyseius cucumeris for broad mite

Amblyseius cucumeris · predatory mite
Against broad mite

Cornell lists broad mite among its targets, and OMAFRA names it with californicus and swirskii. The best evidence is Israeli work on organic greenhouse sweet pepper, where it gave effective control even though it was rarely found on the leaves: it lives mostly in the flowers (Weintraub 2003, 2007). Koppert says it is not effective above 86 °F (30 °C), and broad mites like warmth, so in hot crops consider swirskii, which controlled broad mite on greenhouse sweet pepper (van Maanen 2010).

Rate50–100 /m² per release; up to 350 /m² at peak pressure (Cornell)
TimingPreventively, early in susceptible crops such as sweet pepper; it fails above 86 °F (30 °C)
Temperature15–25 °C best (Koppert); UConn gives 75–85 °F and Cornell 25–35 °C; not effective above 30 °C (Koppert); humidity above 65–70%

Before you order

Sprinkled onto the leaves or hung in slow-release sachets from planting; it eats only the youngest thrips larvae, so it has to be in place before thrips build up. How it works, how to tell it has established and the supplier list are on the full Amblyseius cucumeris profile.

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Other controls for broad mite

  • Amblyseius swirskiiPredatory mite · Hot-spot rate, 100–300 /m², concentrated on the shoot tips
  • Neoseiulus californicusPredatory mite · No broad-mite rate is published; Biobest's spider-mite hot-spot rate is 100–200 /m²
  • Amblyseius andersoniPredatory mite · 20–100 /m² (Biobest); 50–250 /m² weekly (Koppert)