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Predatory Mite

Neoseiulus (Amblyseius) californicus

Neoseiulus (Amblyseius) californicus is a very commonly used predatory mite. It is often referred to as the “Cali mite”.   It will feed on two-spot spider mites, carmine mites, and eriophyid mites. Alternatively it will feed on pollen and other arthropods, keeping itself alive when there is a shortage of prey to feed on.  I like to think of is a more the “slow release” mite, working at a consistent steady pace.

The Cali mite is active at temperatures from 55 F to 105 F.  Another interesting trait about the Cali mite is that if they run out of any food source, they will cannibalize their young to stay alive.  After they run out of food and begin to starve, if a food source is then found, the females will then “fatten” up and start to lay eggs again.  When persimilis starve down, they can not recover.

Description- Their bodies are pear-shaped and ivory in color. 

Host Pest- The N. californicus mite feeds primarily on spider mites.  Also they will feed on broad mites, cyclamen mites, and pollen. 

Biology- N. californicus does better in warm, humid conditions, with a minimum RH of 50% and temperatures up to 38°C. Like all other arthropods, the time to complete its life cycle varies with temperature. N. californicus can complete its life cycle in 1 to 2 weeks.  An adult female, on average, can lay 3 eggs per day. 

Want to learn more about N. californicus? Visit Sterling Insectary's website.  They are a producer based in California.

Neoseiulus californicus feeding

on Two Spotted Spider Mites

(photo may not be used without permission)



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