Eotetranychus aceri Reck, 1948

Origin of the specimens examined — Area H: Boljevci (44°49’02”N, 20°26’05”E), on Prunus domestica (Rosaceae), 7♀ and 5♂, 17/06/2013; Area Q: Goč-Dobre vode (43°34’13”N, 20°45’03”E), on Pyrus pyraster (Rosaceae), 2♀ and 4♂, 28/09/2013; Area R: Rtanj-Valakonje (43°52’14”N, 21°58’48”E), on Acer pseudoplatanus (Sapindaceae), 7♀ and 5♂, 03/08/2013 ; Area V: Stara Planina-Temska (43°15’40”N, 22°33’09”E), on Acer campestre (Sapindaceae), 3♀ and 2♂, 12/08/2015 .

Remarks — This is the first record in the Balkan Peninsula. The species was found on four host plants from two families, with three plants species as its new hosts in the world P (. pyraster is new host for spider mites). It is a Palearctic species found in Spain, France, Italy and Georgia, previously recorded only on host plants from Acer spp. (Migeon and Dorkeld, 2017).

Eotetranychus fraxini Reck, 1948

Origin of the specimens examined — Area C: Fruška Gora-Kraljeva stolica (45°09’16”N, 19°49’10”E), on Fraxinus excelsior (Oleaceae), 3♀ and 6♂, 17/09/2015; Area M: Negotin-Karabulovo (44°13’00”N, 22°25’48”E), on Fraxinus ornus (Oleaceae), 7♀ and 2♂, 17/08/2015.

Remarks — This is the first record in the Balkan Peninsula. It is a Palearctic species found in Armenia, Georgia, Ukraine, Hungary and Italy on host plants from Fraxinus spp. (Migeon and Dorkeld, 2017).

Eotetranychus pruni Oudemans, 1931

Origin of the specimens examined — Area D: Bela Crkva-Jezero (44°53’40”N, 21°24’41”E), on Corylus colurna (Betulaceae), 7♀ and 4♂, 21/10/2015; Area E: Morović-Bosut (45°00’29”N, 19°13’10”E), on Corylus avellana (Betulaceae), 3♀ and 4♂, 01/08/2015; Area H: Belgrade-Tašmajdan (44°48’28”N, 20°28’18”E), on Carpinus betulus (Betulaceae), 2♀ and 6♂, 10/09/2015; Area V: Pirot-Slavinja (43°09’37”N, 22°52’38”E), on Ribes rubrum (Grossulariaceae), 9♀ and 4♂, 11/08/2015 ; Area M: Negotin (44°14’08”N, 22°31’43”E), on Tilia platyphyllos (Malvaceae), 5♀ and 3♂, 17/08/2015, Fraxinus excelsior (Oleaceae), 8♀ and 3♂, 18/08/2015; Area T: Golija-Gradac (43°20’29”N, 20°17’42”E), on Malus domestica (Rosaceae), 5♀ and 8♂, 02/08/2016 ; Area T: Golija-Golijska reka (43°21’09”N, 20°15’20”E), on Potentilla argentea (Rosaceae), 7♀ and 6♂, Prunus avium (Rosaceae), 2♀ and 9♂, 02/08/2016 ; Area O: Tara-Rastište (43°56’27”N, 19°21’58”E), on Prunus domestica (Rosaceae), 7♀ and 2♂, 21/06/2013; Area O: Tara-Rača (43°55’45”N, 19°31’3”E), on Pyrus pyraster (Rosaceae), 8♀ and 2♂, 14/05/2013; Area X: Vlasina-Đošini (42°42’48”N, 22°19’08”E), on Pyrus communis (Rosaceae), 2♀ and 2♂, Area U: Kopaonik-Brzeće (43°17’55”N, 20°53’10”E), on Rosa sp. ( Rosaceae), 12♀ and 3♂, 24/08/2013; Area K: Kučevo-Srpce (44°33’13”N, 21°35’01”E), on Ulmus minor (Ulmaceae), 8♀ and 4♂, 21/08/2015; Area H: Belgrade-Ada Huja (44°49’23”N, 20°31’35”E), on Ulmus rubra (Ulmaceae), 15♀ and 6♂, 11/10/2015.

Remarks — In our study this species was found on 15 host plants from six families, with nine plant species as its new hosts in the world. It is a species with 32 records in Palearctic countries (including, Slovenia, Romania, Bulgaria and Greece in the Balkans) and it is considered to be a pest of economic plants, found on 30 hosts (Bohinc and Trdan, 2013; Vacante, 2016; Migeon and Dorkeld, 2017).