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Plants (Basel)

Title:		Hydrolats from Humulus lupulus and Their Potential Activity as an Organic Control for Varroa destructor
Author(s):		Iglesias AE; Fuentes G; Mitton G; Ramos F; Brasesco C; Manzo R; Orallo D; Gende L; Eguaras M; Ramirez C; Fanovich A; Maggi M;
Address:		"Centro de Investigacion en Abejas Sociales (CIAS), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata CP 7600, Argentina. Instituto de Investigaciones en Produccion, Sanidad y Ambiente (IIPROSAM), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata CP 7600, Argentina. Laboratorio de Investigaciones en Evolucion y Biodiversidad, Universidad Nacional de la Patagonia San Juan Bosco, Esquel CP 9200, Argentina. Departamento de Quimica y Bioquimica, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata CP 7600, Argentina. Instituto de Investigaciones en Ciencia y Tecnologia de Materiales (INTEMA), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata CP 7600, Argentina"
Journal Title:		Plants (Basel)
Year:		2022
Volume:		20221201
Issue:		23
Page Number:		-
DOI:		10.3390/plants11233329
ISSN/ISBN:		2223-7747 (Print) 2223-7747 (Electronic) 2223-7747 (Linking)
Abstract:		"Varroa destructor is a parasitic mite, which is considered a severe pest for honey bees causing serious losses to beekeeping. Residual hydrolats from steam extraction of hop essential oils, generally considered as a waste product, were tested for their potential use as acaricides on V. destructor. Four hop varieties, namely Cascade, Spalt, Victoria, and Mapuche, showed an interesting performance as feasible products to be used in the beekeeping industry. Some volatile oxidized terpenoids were found in the hydrolats, mainly beta-caryophyllene oxide, beta-linalool, and isogeraniol. These compounds, together with the presence of polyphenols, flavonoids, and saponins, were probably responsible for the promissory LC(50) values obtained for mites after hydrolat exposition. Victoria hydrolat was the most toxic for mites (LC(50): 16.1 microL/mL), followed by Mapuche (LC(50) value equal to 30.1 microL/mL), Spalt (LC(50) value equal to 114.3 microL/mL), and finally Cascade (LC(50): 117.9 microL/mL). Likewise, Spalt had the highest larval survival, followed by Victoria and Mapuche. Cascade was the variety with the highest larval mortality. In addition, none of the extracts showed mortality higher than 20% in adult bees. The Victoria hydrolat presented the best results, which makes it a good compound with the prospect of an acaricide treatment against V. destructor"
Keywords:		Apis mellifera Varroa destructor beta-caryophylene oxide hydrolats terpenoids volatile compounds;
Notes:		"PubMed-not-MEDLINEIglesias, Azucena Elizabeth Fuentes, Giselle Mitton, Giulia Ramos, Facundo Brasesco, Constanza Manzo, Rosa Orallo, Dalila Gende, Liesel Eguaras, Martin Ramirez, Cristina Fanovich, Alejandra Maggi, Matias eng PICT 0337-2017/Agencia Nacional de Promocion Cientifica y Tecnologica/ PICT 2823-207/Agencia Nacional de Promocion Cientifica y Tecnologica/ Switzerland 2022/12/12 Plants (Basel). 2022 Dec 1; 11(23):3329. doi: 10.3390/plants11233329"