Amblyseius

Berlese, 1914

Amblyseius is a large of predatory in the . in this genus are that feed on pest mites, , , and other small . Several species, particularly A. swirskii and A. andersoni, are widely used as agents in programs for agricultural . The genus exhibits considerable ecological versatility, with many species capable of surviving on alternative food sources such as pollen and fungal secretions when is scarce.

Amblyseius swirskii bearing Beauveria bassiana conidia by Lin, G., Guertin, C., Di Paolo, SA. et al.. Used under a CC BY 4.0 license.

Neoseiulus cucumeris and Amblyseius swirskii bearing Beauveria bassiana conidia by Lin, G., Guertin, C., Di Paolo, SA. et al.. Used under a CC BY 4.0 license.

Neoseiulus cucumeris bearing Beauveria bassiana conidia by Lin, G., Guertin, C., Di Paolo, SA. et al.. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Amblyseius: //ˌæmblɪˈsaɪəs//

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Images

Habitat

Agricultural including vegetable , orchards, and greenhouse environments. occupy diverse substrates, with some showing preferences for leaves or plants bearing (small leaf shelters). Greenhouse and screenhouse systems in temperate, subtropical, and tropical climates provide protected environments that enhance establishment and activity.

Distribution

distribution with occurring across Europe, Asia, Africa, and the Americas. Amblyseius swirskii, originally described from Israel, has been commercially released in more than 50 countries and has established in many regions. European orchard species such as A. andersoni are naturally distributed across European cropping systems.

Diet

on small pests including (), false spider mites, russet , broad mites, (first ), and . Many supplement predation with alternative food sources including pollen (notably Typha spp.), nectar, secretions, , and fungal pycnial fluid.

Life Cycle

Developmental stages include , , , , and . Laboratory rearing conditions for research purposes typically maintain colonies at 25±1°C with 65±10% and 16L:8D . time varies with and environmental conditions. Females eggs in protected locations such as leaf .

Behavior

Predatory actively hunt on surfaces. Some exhibit preference for specific microhabitats, laying in or sheltered locations. of eggs has been observed under laboratory conditions. persistence is maintained through feeding and use of nonprey food sources during periods of prey scarcity.

Ecological Role

Important and agents in agricultural . Suppress of and small pests, contributing to natural pest regulation and prevention of . Serve as components of and strategies in , vegetables, and protected systems.

Human Relevance

Widely employed as commercial agents for pest management in agriculture. Amblyseius swirskii ranks among the most researched and deployed predatory for vegetable protection. with pollenproducing plants (e.g., sweet alyssum, buckwheat, ornamental peppers) is used to enhance establishment. Susceptibility to varies among and strains, requiring careful timing of chemical applications to preserve predator .

Similar Taxa

Phytoseiulus persimilisAnother predatory widely used in ; Amblyseius are generally more and better able to persist on alternative foods than this .
Neoseiulus californicusClosely related with overlapping ; ranks second in research volume after P. persimilis, while A. swirskii is third.
Kampimodromus aberransCooccurring in European orchards; A. andersoni is typically the predatory in Italian apple orchards where both may be present.

More Details

Pesticide Interactions

Susceptibility to and varies significantly among and strains. Amblyseius andersoni have shown unexpected persistence under exposure in Italian apple orchards, with some strains exhibiting no significant mortality to deltamethrin. In contrast, A. swirskii stages are generally more susceptible to than . Reducedrisk products such as potassium salts of have minimal detrimental effects when applied correctly.

Commercial Production

Massreared and distributed globally for . Quality of commercial products depends on rearing practices and provider reliability. Cattail pollen (Typha spp.) is the most commonly used supplemental pollen for enhancing establishment in release programs.