Feltiline, feltiella acarisugaFeltiline, feltiella acarisuga

Feltiline (Feltiella acarisuga)

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Feltiella acarisuga (formerly known as Therodiplosis persicae), is a predatory Cecidomyid midge. This species is highly specialist for feeding on spider mite. The larvae are a translucent to yellowish colour and feed exclusively on spider mites. This is a voracious predator which is best suited to curative control of established spidermite colonies.

Target Crops » All indoor and outdoor crops
Target Pest » Spider Mite
Target Life Stage » Whole life cycle
Delivery Systems » Trays

Target Pests

  • Spider Mite (Tetranychidae)

How It Works

  • Adult females will actively search the crop to find spider mite colonies. Once they find a colony they will lay their eggs next to it. The eggs will hatch to become predatory larvae which will feed exclusively on spider mites.
  • The larvae will eventually form cocoons on the leaves which will hatch into the next generation of adults. Feltiella will not disperse if adequate food is present so it is important to ensure proper distribution in the greenhouse.
  • Do not use in presence of generalist predators like Macrolophus or Nesidiocoris. Avoid regular use of sulphur which can affect the survival and development of Feltiella. Feltiline should be used as part of an IPM program including predatory mites such as Phytoline, Californiline or Anderline.

Available delivery systems

  • Tub containing 250 insects

Handling & Storage

Instructions for use

  • Remove lid and place the tub in the shade on the ground close to spider mite colonies, but away from irrigation systems.
  • Use 1 tub per localised outbreak. Repeat 4 times at weekly intervals. Use 1 tub per 1000 m2 for more generalised attacks.
  • Continue release until cocoons appear under leaves (22-25 days at 22°C)


  • Transport and store in darkness at 10-15°C.
  • Keep out of direct sunlight.
  • Use within 48 hours of receipt.