Spider Mite Predators
Neoseiulus fallacis, Amblyseius andersoni, Phytoseiulus persimilis, Amblyseius swirski, Galendromus occidentalis, Neoseiulus californicus, Mesoseiulus longipes, Stethorus punctillum.
Neoseiulus fallacis is an extremely effective spider mite predator. It is the most effective preventer of spider mites available. In long term crops usually one application at a rate of 1 to 2 mites per square meter is enough to achieve multi-year spider mite control. In starving conditions, fallacis is a generalist, capable of feeding on many other pests, especially their eggs. If no pest is present, fallacis will survive on wind-blown pollen.
It's to control two-spotted spider mites and other mites on greenhouse peppers, field strawberries, raspberries, currants and mint. In British Columbia, Washington and Oregon, IPM programs for field berry crops are based on using Fallacis as the primary control for spider mites. Fallacis is also used on container and field-grown nursery stock. Research in Oregon found that Fallacis can control the spider mites ilicis, ununguis, and urticae on woody ornamentals Thuja, Skimmia, Weigela, Potentilla, Euonymus, and Buddleia and bamboo mite (Schizotetranychus celarius). Fallacis feeds on apple rust mite Aculus schlectendali, cyclamen mite Steneotarsonemus pallidus and tomato russet mite Aculops lycopersici, however, whether it controls these species is not known. Fallacis is more resistant to pesticides than most biological controls and a strain highly resistant to pesticides is available commercially. Unlike other predatory mites, such as the Persimilis predatory mite, Fallacis can remain in areas with low levels of spider mites, they survive in the absence of mite prey by feeding on other small arthropods and pollen. They do best where there is a dense plant canopy and when relative humidity is over 50%.
Amblyseius andersoni is a predatory mite that feeds on many types of small arthropod prey and pollen. It is ideal for preventive protection of greenhouse or outdoor ornamentals, vegetables and fruit crops. Predator of two-spotted spider mite, European red mites, broad mites, cyclamen mites and russet mites. Will also feed on pollen and thrips larvae allowing the population to survive when pest mite populations decrease. Active at a broader temperature range 43-104°F than Phytoseiulus persimilis and Amblyseius californicus. Since it is effective at lower temperatures, Amblyseius andersoni can be introduced much earlier in the growing season than other predatory mites. For best results, release Amblyseius andersoni when pest mite populations are low. The predatory mites will feed on small colonies of pest mites, preventing them from growing in to large populations that can cause major crop damage. These mites can also survive on young larvae of thrips, flower pollen, sugary excretions from pests, and fungi, so they can be introduced before the prey is present.
Amblyseius Swirski Predatory Mite, Amblyseius swirskii is an excellent biological control agent and has been used in controlling tiny pests such as whiteflies, thrips and spider mites that cause a serious damage to many economically important crops grown both in the greenhouses and fields. Effective against the following pests: Asian Citrus Psyllid, Broad mites, russet mites, two spotted spider mite, Western flower thrips, Chilli thrips, Asian Citrus Psyllid, Greenhouse whitefly, and Tobacco whitefly.
Amblyseius swirskii is a very effective generalist predatory mite used to suppress immature thrips, two-spotted spider mites, cyclamen (or strawberry) mites (Phytonemus pallidus), broad mites (Polyphagotarsonemus latus), mites of the genus Schizotetranychus and whiteflies in ornamental, fruit and market garden crops. Adults are pear-shaped, 0.5 mm long, with long legs. The eggs are round and transparent and measure 0.14 mm in diameter. These mites lay their eggs on leaf hairs (trichomes) and along the veins on the inner surface of leaves. The eggs hatch about 3 days later.
Stethorus punctillum is one of the most important and frequent predators of spider mites in fruit orchards. Beetles consume all stages of mites; adults can consume 75 to 100 mites per day and large larvae can devour up to 75 mites per day, so they quickly lessen an outbreak of spider mites. Adults are very active when in fruit trees and if disturbed they will often fall to the ground. They are good fliers, and therefore tend to concentrate in areas of the orchard where mites are plentiful and disappear when the mite population becomes low. There must be 2-5 motile mites per leaf to keep S. punctum in an orchard, and pockets of 8-10 mites per leaf are required for reproduction.
Target Pests Two-spotted spider mite, European red mite, Spruce spider mite, Southern red mite, The Stethorus punctillum is a specialized spider mite predator in the lady beetle family
Approximate release rates for predatory mites:
- For tomatoes and cucumbers, 10 predator per plant plus 1-2 per infested leaf.
- For other greenhouse crops, tropical plants, and outdoor gardens, 2,000 per 3,000 sq. ft.
- For bedding plants, 4,000-8,000 per 5,000 sq. ft.
- For large agri-business, 25,000 - 50,000 per acre depending on infestation.