Persiliv (P. persimilis), Adult

Amount: 10,000 or 500ml

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Please Note: Release rates vary depending upon the crop, infestation level and season of the year. If you require more assistance contact us for a free consultation here.

Persimilis flourishes in a warm and humid environment. Optimum conditions are 20-27°C and humidity of over 60%. In fact, it can multiply twice as fast as its prey at a temperature of 25°C. Spider mite, on the other hand, prefer hot dry conditions. Thus dense foliage and plants close together creates a microclimate favourable to Persimilis. However take note, Persimilis prefers humid but not wet environment. Thus overhead irrigation should be applied before introducing the predators. Similarly, if it is going to rain, postpone the release till plants are dry. Persimilis can be stored for up to 7 days at the temperature of 7-10 °C.

Persimilis has been known to successfully work on many crops such as papaws, strawberries, cut flowers, hops, raspberries, capsicum, eggplant, tomatoes, greenhouse vegetables, ornamentals, blackcurrants, pome fruit, stone fruit, and grapes. As well as in field crops such as corn and soybeans.

Pesticide and Other Controls:

Pesticide should have at least two weeks to break down before Persimilis is released. Depending on the type of pesticide used it can take longer due to different toxicity levels. Synthetic pyrethroids and some organophosphates can take up to 8 weeks to degrade. 

Persimilis are usually found under the leaves of the plant since that’s where the two-spotted spider mite infestations are, thus if spraying is necessary we recommend using a *selective pesticide only applied to the upper foliage of the leaves. Spot treatment is preferred rather than blanket spraying for best results. 

Supreme oils, soaps, and spread stickers are not damaging to Persimilis unless they’ve come into contact with the pesticide.

Ideal Environment:

Tips and Tricks:

Release Rates and Tips:


Phytoseiulus persimilis is an excellent curative agent of the two-spotted spider mites and other spider mite species. Even though it is only slightly larger then the spider mite it can consume about 20 nymph or 7 adult pests per day. Adult Persimilis feed on spider mite eggs, nymphs, and adults while young stages of Persimilis consume only on the eggs and nymphs. Adult female Persimilis can lay about 60 eggs, which it lays within the spider mite concentrations to ensure food supply for its young. Persimilis is shipped in a bottle of 10K adults.

  • Persimilis thrives in a humid environment of greater than 60%, especially during the egg stage. To increase humidity you can lightly mist plants or wet walkways.

  • Persimilis should only be used as a curative method, the predator can not survive without its food supply, the two-spotted spider mite, and will starve to death if used as a preventative method. 

Persimilis is a tiny orange fast moving predator that is very easy to distinguish from its prey, which is slow and pale green with two dark spots on its sides. Sometime in the winter some spider mites may develop a red tinge but can still be distinguished from Persimilis by its slow movement.

Finding Persimilis on your crops (especially during the first week of introduction) is not easy if you have no scouting training since they move very quickly through the crops in search of food. We recommend marking the hot spots of the spider mites and releasing Persimilis there. These sites can be assessed routinely to determine the spider mite population as well as the establishment of Persimilis.

Some good signs are webbing free new plant growth and damaged or empty webbing. Reinfestation by spider mite can occur especially in closed interior environments such as greenhouses. If low levels of Persimilis are still around they will reestablish to compensate for the outbreak. Growers should practice routinely check-ups to determine the presence or absence of both spider mites and Persimilis. 

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Persimilis should be released at the first sign of spider mite infestation, concentrate the release in areas where hot spots are present as well as the surrounding crops. Persimilis has a high reproduction rate and usually exhausts its food supply and eventually dies out. That’s why for best results repeated introduction is recommended until all areas with spider mite outbreaks have Persimilis. In general 20 Persimilis per infested leaf is recommended weekly. Some specific crop programs require the following release rate: