Predatory mite, Amblyseius andersoni

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Predatory mite, Amblyseius andersoni (Womersley), is been widely used as a biological control agent to control different species of pest mites (see below) that cause a serious damage to many economically important crops that grown both in the greenhouses, nurseries and fields. Predatory mite, Amblyseius andersoni overwinter by entering into diapause that is a dormant period in which these mites suspend their physical and physiological activities, reproduction and development to survive harsh winter conditions. These overwintering predatory mites generally become active from January onward. Adults of Amblyseius andersoni are beige colored tiny mites that are about 1.0 mm in size. Females of Amblyseius andersoni generally lay oval shaped eggs onto leaf hairs. These eggs hatch into tiny larvae with six legs. These larvae then develop through two successive developmental stages known as protonymphal and deutonymphal stages. Both these immature nymphal stages resemble to their parents known to feed on the eggs, nymphs and adults of pest mites.

Facts (show all)

- Effective against the following pest mites
  • Broad Mite, Polyphagotarsonemus latus
  • Cyclamen Mite, Phytonemus pallidus
  • European red mite, Panonychus ulmi
  • The bulb scale mite, Steneotarsonemus laticeps
  • Thrips, Thrips tabaci
  • Tomato Russet/Rust mites, Aculops lycopersici
  • Two spotted spider mites, Tetranychus urticae
+ Key factors for Amblyseius andersoni effectiveness
  • Predatory mite, Amblyseius andersoni feed on several species of pest mites that are one of the most damaging pests of many field and fruit crops, ornamental plants including apples, beans, chrysanthemums, corn, geranium, gerbera, grapes, ivy, peaches, peppers, potatoes, raspberries, roses, Strawberries, tomatoes.
  • Predatory mites, Amblyseius andersoni have ability to survive, reproduce and develop at a wide range of temperature between 6-40°C (43-104°F).
  • This predatory mite can feed on eggs, nymphs and adults of pest mites.
  • These predatory mites can survive without food until their host mites become available.
+ How predatory Amblyseius andersoni mite works in the field
  1. Amblyseius andersoni mites are supplied as adults in shaker tubes and waterproof sachets containing a mixture of bran and vermiculite.
  2. After application in the greenhouses or nurseries, Amblyseius andersoni mites immediately can start munching on the eggs, nymphs and adults of pest mites.
  3. While feeding, these predatory mites can develop and reproduce rapidly.
  4. Under favorable environmental conditions and if there is enough food around, these mite can recycle continuously (do not need to apply again and again) and help to keep the pest population under economic threshold level.
+ Which stages of pest mites are killed by predatory mite Amblyseius andersoni?
  • Eggs
  • Nymphs
  • Adults
+ How many Amblyseius andersoni predatory mites should be released?
  • 4-5 predatory mites/square feet (0.1 sq. meter) area bi-weekly, 2-3 times.
+ When and how Amblyseius andersoni predatory mites should be released for the effective control of mites?
  • Amblyseius andersoni mites are supplied as adults in shaker tubes and waterproof sachets containing a mixture of bran and vermiculite.
  • If you are not ready to release these predatory mites upon their arrival then store these containers with mites in a dark place at cooler temperatures between 10-15°C (50-59°F).
  • Hang the sachets or shaker tubes to plants at every 5-12 feet in the garden or greenhouses.
  • Hang one sachet per tree.
  • As these predatory mites are very active, they will disseminate themselves throughout the garden or greenhouse to seek their hosts.
  • As a preventive control measure these mites should be released when there is a very low population of pest mites.
  • As a curative measure these predatory mites should be released when there is a large population of pest mites.
  • Release predatory mites, Amblyseius andersoni when temperature is between 6-40°C (43-104°F) and the relative humidity is between 40-60%.
+ Why you need them
  • they can reduce the crop damage by feeding on the eggs nymphs and adults of pest mites
  • they are able to actively search for their host, the different species of mites
  • they can reproduce and continue their life cycle in the garden after first application
  • they are commercially available and easy to release in the greenhouses or fields
+ Why they are safer than traditional pesticides
  • they do not damage plants
  • do not cause any harm to the personnel involved in their production and application
  • food products are safe to handle and eat when they are treated with predatory mites
  • they do not harm humans, animals and pollute the environment
+ Research Papers
  1. Croft, B.A., Prati, P.D., Koskela, G. and Kaufman, D. 1998. Predation, Reproduction, and Impact of Phytoseiid Mites (Acari: Phytoseiidae) on Cyclamen Mite (Acari: Tarsonemidae) on Strawberry. Journal of Economic Entomology 91: 1307-1314.
  2. Drescher, K., Schade, M. and Sengonca, C. 2000. Is a biological control of Thrips tabaci Lindeman in the field achievable? Mitteilungen der Deutschen Gesellschaft für allgemeine und angewandte Entomologie 12: 97-100.
  3. Fischer, S. and Mourrut-Salesse, J. 2005. Tomato Russet Mite in Switzerland (Aculops lycopersici: Acari, Eriophyidae). Revue Suisse de Viticulture, Arboriculture et Horticulture 37: 227-232.
  4. Genini, M. and Baillod, M. 1987. The introduction of resistant strains of Typhlodromus pyri (Scheuten) and Amblyseius andersoni Chant (Acari: Phytoseiidae) in apple orchards. Revue Suisse de Viticulture, d'Arboriculture et d'Horticulture 19:115-123.
  5. Ivancich Gambaro, P. 1990. Diapause in Amblyseius andersoni Chant (=A. pontillae Garman) (Acarina Phytoseiidae) in the climate of the Po Valley. Bollettino di Zoologia Agraria e di Bachicoltura 22: 31-41.
  6. Messelink, G.J. and van Holstein-Saj, R. 2007. Biological control of the bulb scale mite Steneotarsonemus laticeps (Acari: Tarsonemidae) with Neoseiulus barkeri (Acari: Phytoseiidae) in amaryllis. Integrated Control of Plant-Feeding Mites IOBC/wprs Bulletin 30: 81-85.
  7. Walzer, A. and Schausberger, P. 2011. Sex-specific developmental plasticity of generalist and specialist predatory mites (Acari: Phytoseiidae) in response to food stress. Biological journal of the Linnean Society 102: 650-660.

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