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Fig. 1. Bryobia vasiljevi adult female - dorsal habitus.
Fig. 2. B. vasiljevi adult female - prodorsal lobes (note indentation between inner lobes is shallow - see Notes)
Material examined
non-types
Taxonomy
Subfamily Bryobiinae
Tribe Bryobiini
Distribution
+Australia, CIS, Chile, France, *Georgia, Greece, Hungary, Italy, New Zealand, Serbia-Montenegro, Syria
Taxonomy Changes
Bryobia vasiljevi Reck 1953
Bryobia repensi Manson 1967, synonymy Livshits & Mitrofanov 1971
Diagnosis
Larva
- setae v1 and other medial setae shorter than lateral setae
Female
- peritreme ending in elongate oval expansion
- prodorsal setae v2 slightly larger than setae v1
- prodorsal lobes cylindrical-conical, outer lobes longer than inner
- indentation between inner and outer prodorsal lobes deep
- indentation between inner lobes deep (not shown in figure)
- dorsal body setae spatulate
Hosts
Over 30 species including: Amaranthus sp. (Amaranthaceae), Asparagas sp. (Asparagaceae), *Campanula alliariifolia (Campanulaceae), *Festuca djimilensis, F. rubra (Poaceae), Fragaria sp., Malus domestica (Rosaceae), Medicago sativa (Fabaceae), Passiflora mollissima (Passifloraceae), Solanum gayanum (Solanaceae), Tritfolium sp. (Fabaceae), Triticum aestivum (Poaceae), Vicia sativa (Fabaceae)
Biology
These mites feed mainly on the upper surface of leaves and may cause severe bleaching of the blade. Heavy infestations are correlated with periods of dry weather (Hamilton 1972).
References
Bolland H.R., Gutierrez J., and Flechtmann C.H.W. (1998) World Catalogue of the Spider Mite Family (Acari: Tetranychidae). Brill Academic Publishers, Leiden, 392 pp.
Hamilton, J.T. (1972) Bryobia repensi Manson, a new pasture pest and its control. Journal of the Australian Institute of Agricultural Science 38: 62
Livshits, I.Z. and Mitrofanov, V.I. (1971) The mites of the genus Bryobia C.L. Koch, 1836 (Acariformes, Bryobiidae). Tr. Gos. Nikit. Bot. Sada 51: 1-112
Manson, D.C.M. (1967) The spider mite family Tetranychidae in New Zealand. I. The genus Bryobia. Acarologia 9: 76-123
Migeon, A. and Dorkeld, F. (2006-2017) Spider Mites Web: a comprehensive database for the Tetranychidae. http://www.montpellier.inra.fr/CBGP/spmweb
*Reck, G.G. (1953) Research investigation on the fauna of the Tetranychidae in Georgia. Tr. Inst. Zool. Akad. Nauk. Gruz. S.S.R. 15: 2-28
+Womersley, H. (1940) Studies in Australian Acarina, Tetranychidae and Trichadenidae. Transactions of the Royal Society of South Australia 64: 233-265
Notes
Bryobia vasiljevi was recorded in Australia under the name B. repensi by Womersley (1940), Hamilton (1972) and Gutierrez and Schicha (1983).
Specimens identified as B. vasiljevi in Australia have a shallow indentation between the inner prodorsal lobes (Fig. 2), instead of a deep indentation as is recorded in other descriptions of the species.
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