Description
Feltiella acarisuga is a predatory midge utilized for spider mite control. Due to the voracious feeding nature of this predator, they are not suitable for preventative releases. After mating, females have excellent searching capabilities, and can deposit eggs on plant tissue within spider mite colonies. Larvae can feed on five times as many spider mites as the predatory mite Phytoseiulus persimilis, and begin feeding immediately after hatching. Larvae tend to be slow moving, and the three install stages can feed on all life stages of spider mites. Feltiella can be active during cold, dark conditions, and may be suitable for early spring releases if adequate food sources are available. Feltiella can navigate prey in difficult environments such as the hairy leaves of cucumber and tomatoes. Some species of Feltiella have been observed as predators of aphids, scales, eriophyid mites and other arthropods, however, there is no documentation of Feltiella.
Target Pests
Used for control of Two Spotted Spider Mite (Tetranychus urticae), Carmine Spider Mite (Tetranychus cinnabarinus) and European Red Mite (Panonychus Ulmi).
Life Cycle
Feltiella are received as pupae, and emerge as adults which lay their eggs near spider mite colonies. Once the eggs hatch, Feltiella undergoes three larval stages, and the cycle repeats. Although predators may be maintained at low humidity, higher humidity will help them establish in the crop.
Identification
The eggs are clear and 1/100" (.25mm) long. The larvae are 1/100" to 1/12" (.25 - 2mm) long, and vary in color from yellow to orange to red depending on diet. The pupae can be found inside white cocoons along the veins of the leaves. Adult Feltiella acarisuga are small, delicate flies that reach about 1/12" (2mm) long. The body, wings and antennae tend to be covered in hair, which is easily rubbed off.
Release Rate
500 to 1,000 per acre or 10-25+ per 1,000 sf canopy. Apply 2 weeks in a row for best establishment.
