Euseius gallicus Kreiter and Tixier, 2009

Çakir, Şeyma, Tixier, Marie-Stephane & Ozman-Sullivan, Sebahat K., 2020, Phytoseiid species (Acari: Phytoseiidae) on walnut trees in Samsun Province, Turkey, Acarological Studies 2 (1), pp. 24-33 : 26

Euseius gallicus Kreiter and Tixier, 2009

Material examined: The twenty four E. gallicus females found in this study were all on the lower leaf surface - Samsun, Kavak, Kayaköy (41°05'46.5"N 36°01'21.3"E), 28.07.2018, 1♀ ; Havza, Yazıkışla (41°01'24.2"N 35°35'11.9"E), 29.07.2018, 1♀ ; Salıpazarı, Alan (41°03'47.7"N 36°47'09.5"E), 30.07.2018, 2♀♀ ; 18.08.2018, 1♀ ; Tekkeköy, AşağıÇinik (41°11'36.1"N 36°29'00.7"E), 30.07.2018, 1♀ ; Vezirköprü, Yenice (41°03'40.8"N 35°30'20.2"E), 31.07.2018, 3♀♀ ; Vezirköprü, Pazarcı (41°04'19.5"N 35°29'52.2"E), 31.07.2018, 1♀ ; AlaÇam, SoğukÇam (41°36'09.0"N 35°45'06.7"E), 17.08.2018, 2♀♀ ; İlkadım, Kapaklı (41°16'12.9"N 36°11'22.3"E), 12.09.2018, 1♀ ; Ayvacık, Söğütpınar (41°03'57.1"N 36°38'34.3"E), 14.09.2018, 3♀♀ ; AlaÇam, Geyikkoşan (41°37'12.6"N 35°36'28.7"E), 17.09.2018, 1♀ ; Bafra, GökÇekent (41°33'05.0"N 35°51'31.1"E), 17.09.2018, 3♀♀ ; Ondokuzmayıs, Yukarı Engiz (41°28'56.6"N 36°03'28.9"E), 17.09.2018, 3♀♀ ; Tekkeköy, SepetÇiler (41°12'07.3"N 36°26'34.9"E), 18.09.2018, 1♀ .

Comments: Euseius gallicus was first found and identified in France from the leaves of large-leaved summer linden ( Tilia platyphyllos Scopoli ), sour cherry ( Prunus cerasus L.), horse chestnut ( Aesculus hippocastanum L.), laurustinus ( Viburnum tinus L.) and grape ( Vitis vinifera L.) in 2009 ( Tixier et al., 2009). Later, it was found on Tilia cordata (Miller) in Belgium, Lycium barbarum L. in Germany, Rosa sp. cv. Red Naomi in Holland and Ipomea sp. in Trabzon, Turkey ( Döker et al., 2014b), and on Capsicum annuum L., Phaseolus vulgaris L. and Cucumis sativus L. in Ordu, Turkey ( Soysal and Akyazı, 2018). This study reports this species for the first time on walnut trees in Turkey. Euseius species are pollen feeding, type IV generalist predators ( McMurtry and Croft, 1997). Euseius gallicus has shown potential as a biocontrol agent for western flower thrips and whiteflies on roses when Typha sp. (cattail) pollen is supplied as an additional food source ( Wackers, 2013). It has been commercially produced since 2014 ( Anonymous, 2019b).