Phytoseiulus persimilis

Phytoseiulus persimilis is a predatory mite and is widely applied for the defense of vegetable crops in glass-covered ground. Phytoseiulus can be applied for vegetable crops and ornamental plants in glass-covered ground: the sweet pepper, the cucumber, the tomato, the melon, the eggplant, the strawberry, the gerbera and the rose.

The size of an acariphage body is about 0.5 mm. Its coloration varies from orange-red to dark-red, sometimes cherry. The egg is oval,lactescent-white with a yellow-orange tint. Its size is 0.18–0.21 mm. . The larvae are not very motile and don’t feed. The female lays 2–6 eggs per day and during life cycle does  up to 100 eggs. The life span of the acariphage is 20–25 days. P. Persimilis has no the stage of diapause and operates during the whole year in glass-covered habitations. Every day the female of Phytoseiulus eliminates about 30 eggs or 24 individuals of the later stages of the pest. The nymphs of the acariphage almost entirely liquidate the remains of pest colonies and also migrate onto other leaves for the search of food.

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In industrial conditions the optimum decision is prophylactic invasions in amounts of 5–10 individuals per 1 m2  every 2 weeks (in dependence on a crop, climate conditions, the level of pest presence). The intensive development of spider mites requires mass invasions: 20–50 individuals per 1 m2 (if necessary invasions are repeated). The most favourable temperature for development of the predator is 25–30°C with a relative air humidity of more than 70%. It is effective application of the complex (blend) of acariphages in the system of crop defense against spider mites. Additionally for the suppression of the pest it is possible to use Amblyseius (Neoseiulus) califiornicus, Ambliseius andersoni.

Advantages

  • application for many crops (vegetable and ornamental);
  • the control of all the pest stages;
  • the high level of activity under the optimum conditions;
  • easy to apply;
  • the ability to suppress to 95% of pest population;
  • the long-term effect of acariphage application.