Phytoseiulus | Effective biological control of spider mites

Written by Kevin van Kester | Last update: 11. February 2022


Phytoseiulus persimilis, a highly voracious predatory mite, is globally recognised for its powerful biological control of spider mites across vegetable, fruit, and flower crops. Learn more about this powerful spider mite control in Canada and the applications in this article.

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Phytoseiulus

 

Key facts about Phytoseiulus persimilis

Phytoseiulus persimilis is a predatory mite distinguished by its orange-to-red, teardrop-shaped body. Larvae and nymphs appear light pink. Under optimal conditions, an adult can lay up to 6 eggs daily, which hatch within a few days. The newly emerged nymphs immediately begin preying on spider mites, rapidly building a large population. Typically, each mite consumes between 5 to 20 spider mites daily.

 

Control of spider mites with Phytoseiulus

Phytoseiulus targets only spider mites. This mite punctures its prey and feeds on its fluids, effectively reducing spider mite populations. Adults focus on feeding on mature spider mites, while the younger stages of Phytoseiulus prefer to consume spider mite eggs, larvae, and nymphs.

 

Optimal temperature & humidity for Phytoseiulus persimilis

Phytoseiulus persimilis thrives under two key conditions: temperatures over 18°C and humidity levels exceeding 50%, with 70% being ideal. This predatory mite performs best between March and November. During winter, its development slows down, making it less effective at controlling spider mites.

 

Best practices for storing Phytoseiulus persimilis

For best results, use Phytoseiulus persimilis immediately upon receipt. If storage is necessary, keep the mites cool, ideally between 8°C and 10°C, for up to 24 hours. To prevent temperature shock, allow the mites to gradually warm up to room temperature before application. Always store the product horizontally and in a dark place.

 

Applying Phytoseiulus persimilis

To use Phytoseiulus, simply distribute the mites evenly across your crop. The amount needed varies with the level of pest infestation. Before application, ensure the product is well-mixed by gently shaking the container to achieve an even spread of mites for effective pest control.

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