Californicus for Spider Mite Control


<em>Neoseiulus californicus</em> adultNeoseiulus (=Amblyseius) californicus is used for the prevention, control, and management of various spider mites. These 0.5 mm. mites are noted for their ability to actively hunt in conditions where prey is few and far between. This mite has also made a bit of a name for itself by being able to deal with some of the nearly microscopic species, like broad mites, Polyphagotarsenomus =Hemitarsonemus latus, cyclamen mites, Phtyodromus =Steneotarsonemus pallidus, tomato russet mites — preventively — Aculops lycopersici, etc.


The females of these mites, which are generally clear-white, lay eggs among pest mites concentrations and in the webbing.

N. californicus can lay up to 43 eggs that hatch into extremely small but hungry larvae like the above mentioned species. The life span of these mites is about 8 days as immatures, then for about 20 days as adults. The conditions for optimum performance will be between 50-110Ā°F with a relative humidity of between 40-60%. Please note, however, considerably cooler and warmer temperatures will hamper reproduction and development a certain degree.


N. californicus have the best possible potential for usage in a crop with no mites. These mites also seem to have another benefit in that they are becoming well-known for taking on some of the microscopic mites species. They seem to be the most promising and garner most of the positive feedback.

<em>Neoseiulus californicus</em> adult


Looking for reduced populations of pest mites is likely the best way to get a handle of what these predators are doing for you in the terms of effectiveness. Look for reduced webbing if you’re using them for larger populations of two-spotted mites. If you’re using them for other purposes, you may have to rely on other means of determination. Seeing them in action, even to the best scouts, is nearly impossible.


Greenhouses, interiorscapes, botanical gardens, even western orchards and field crops. Look at the current or expected conditions, look at the pests, then determine which mite is best for the particular situation you’re dealing with.

Release Rates for Neoseiulus californicus

ClassificationRelease Information
Low infestation0.5 per square feet; regular releases are recommended.
Hot spots2 per square feet
CommentsFor use in areas where little to no prey mites exist. Works well for prevention. Also useful for other mites.
Alert: Release rate suggestions on these pages are usually not sufficient for cannabis growers. For cannabis release rates check out our Cannabis page or contact us with questions. 1 (800) 477 3715.