HEAT ALERT! For deliveries during hot weather please have coolers with cold packs ready with a note--FedEx/UPS drop here. HEAT ALERT! For deliveries during hot weather please have coolers with cold packs ready with a note saying 'FedEx/UPS drop here' if not available to accept delivery.

Galendromus occidentalis


TARGET PEST: Two-spotted spider mites (Tetranychus urticae), McDaniel spider mites, yellow spider mites, apple and pear rust mites, Prunus rust mites, blister mites, and European red mites (Panonychus ulmi). Not effective on mite eggs.

FOR YOUR FILES: Galendromus occidentalis Tech Sheet (PDF)

  • Galendromus occidentalis is a primary biological control agent of pest mites and is used to control mites outdoors for crops, orchards, vineyards, nurseries, and indoors for greenhouses, growing rooms, hydroponics, aquaponics, interiorscapes, and container plants. Adults are white, but once they start feeding they take on the coloration of their prey, usually red or brown. If possible, G. occidentalis should be used before pest mite webbing occurs. Once pest mites are established, a much greater amount of G. occidentalis is required to be effective.

    They are packaged on corn grits or vermiculite.

  • 0.5-1.5 per square foot
  • Gently pour predator on carrier corn grits and extension corn grits into a large jar and gently roll to mix. Gently shake predator and carrier onto the foliage of infested crops. For best results, mist the foliage prior to application so carrier will cling. G. occidentalis will migrate off carrier immediately and seek out prey.

Orders for Galendromus occidentalis must be received by noon on Friday for shipment the following week (see specific items for exceptions).  If the deadline is past, please call us and we will help you find a solution ASAP. (360) 656-6680

See order deadlines and shipping information.

Learn about release instructions for beneficial insects.

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