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Superfamily Tetranychoidea

   Family Tetranychidae

      Subfamily Bryobiinae

         Tribe Bryobiini

            Genus Bryobia 

Common names: clover mites, brown mites

Probability of Encounter: High

Quarantine importance: High.  The genus Bryobia contains a number of economically important pests, including several that are not yet reported from the USA.  Most of the economically important species are highly polyphagous and thelytokous (i.e. without males).  Some well known and widely distributed pests include the brown clover mite Bryobia praetiosa (Koch), a pest of over 250 kinds of plants.  Most of the important pests are similar to B. praetiosa in appearance and difficult to distinguish.  Some of current quarantine interest include:


Similar taxa.  The true spider mites (e.g. species of Eutetranychus) in the Tetranychinae do not have empodia with tenent hairs.  The claws are pad-like in other tribes of Bryobiinae.


 Baker EW & AE Pritchard.  1960.  The tetranychoid mites of Africa.  Hilgardia 29(11): 455-574.

 Baker EW & DM Tuttle.  1994.  A guide to the spider mites (Tetranychidae) of the United States.  Indira Pub. House, West Bloomfield, MI: 347 pp.

Bolland HR, J Gutierre  & CHW Flechtmann. 1998. World Catalogue of the Spider Mite Family (Acari: Tetranychidae). Brill: Leiden.

Helle W & MW Sabelis (eds.) 1985. Spider Mites, Their Biology, Natural Enemies, and Control, vol. 1A. Elsevier: New York.

Jeppson LR, HH Keifer & EW Baker. 1975. Mites Injurious to Economic Plants, University of California Press: Berkeley

Manson DCM.  1967.  The spider mite family Tetranychidae in New Zealand I. the genus Bryobia.  Acarologia 9: 76-123.

Meyer, M.K.P. 1974.  A revision of the Tetranychidae of Africa (Acari) with a key to the genera of the world.  Dept. Agr. Tech. Serv. Mem. 36: 291 pp.

Meyer, M.K.P. Smith 1987.  African Tetranychidae (Acari: Prostigmata) - with reference to the world genera.  S. Afr. Dept. Agr. Water Supply, Entomol. Mem. No. 69: 175 pp.

Morgan CVG. 1960a.  Notes on the occurrence and morphology of Bryobia lagodechiana Reck in British Columbia (Acarina:Tetranychidae). Can. Entomol. 92: 634-636.

Morgan CVG. 1960b.  Anatomical characters distinguishing Bryobia arborea M. and A. and B. praetiosa Koch (Acarina:Tetranychidae) from various areas of the world. Can. Entomol. 92: 595-604

Zhang Z-Q.  2003.  Mites of greenhouses: identification, biology and control.  CABI Publishing, Wallingford:  244 pp.