Hypoaspis miles (Predatory Mites)


Hypoaspis Information

These are live insects and MUST be shipped OVERNIGHT. No USPS or ground shipping.

Hypoaspis is a native species of soil-dwelling mites which feed on small insects and mites. Adults are tan in color and less than 1 mm long. Hypoaspis are used primarily to control young larvae of fungus gnats in the soil or planting media. They also help control soil stages of thrips and may account for up to 30% of thrips control. Hypoaspis does not control shore flies of moth flies, but will feed on other soil organisms such as springtails and root mealybugs. They have been used successfully in bedding and potted plant production, seedling and cutting propagation and poinsettia stock. Hypoaspis adapts well to the various growth media and capillary mats used in plant production, but do not survive freezing of flooding conditions.

LIFECYCLE: The complete life cycle takes about 18 days at 20°C (68°F). The sex ratio is equal, 1:1 females to males. Hypoaspis eggs hatch in 2 to 3 days into young numphs. Each Hypoaspis consumes 1 to 5 prey per day. It can also survive as a scavenger, feeding on algae and plant debris. Populations will naturally fluctuate throughout the growing season.

Release Rates

12,500 Insects 500 sq. ft.
25,000 Insects 1,000 sq. ft.

Release Instructions for Hypoaspis

Once you have made it home with your Hypoaspis you MUST use them immediately. Aphidoletes cannot be stored. Adequate food supplies must be present else this predator can easily starve. Hypoaspis tolerate a variety of conditions except flooding and can survive mild winters but are inactive below 57 degrees. Hypoaspis are for preventative control only, before fungus gnat populations are high. Hypoaspis is supplied in a pasteurized peat/bran mixture in 1 liter (1 qt) containers with a shaker lid for distributing the mixture over the soil. There are 15,000 to 20,000 predators per liter or about 15 to 20 predators per cc. The mixture may also contain another species of mite as a food source for the predators. To check the product for live mites, inspect under 10-15X magnification. The predators are tan and move quickly compared to the food source mites, which are white or translucent and move slowly. Do not mix predators into the growth media before potting because they do not survive. Apply Hypoaspis shortly after planting and before fungus gnat levels reach more than 20 adults/trap/week. To control high numbers of fungus gnats, Hypoaspis can be integrated with insect parasitic nematodes (e.g., Steinernema spp.) and Bacillus thurinigiensis israelensis (BTI) (Vectobac ), both of which control the larval stage of fungus gnats. In general, do not apply Hypoaspis to soil that has been treated with lime or pesticides (particularly soil treated with diazinon). It is likely that foliar sprays are less harmful than soil drenches, depending upon how much pesticide reaches the soil surface. Fungicide drenches containing benzimidazoles are known to reduce reproduction of Hypoaspis. Microbial pesticides, such as Vectobac (BTI) will not harm Hypoaspis.