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Bull Entomol Res

Title:		Volatiles mediate host-selection in the corn hoppers Dalbulus maidis (Hemiptera: Cicadellidae) and Peregrinus maidis (Hemiptera: Delphacidae)
Author(s):		Coll Araoz MV; Jacobi VG; Fernandez PC; Luft Albarracin E; Virla EG; Hill JG; Catalan CAN;
Address:		"PROIMI-Biotecnologia, CONICET, Av. Belgrano y Pje. Caseros, S.M. de Tucuman, Tucuman, Argentina. Facultad de Ciencias Naturales e IML, UNT, Miguel Lillo 205, San Miguel de Tucuman, Argentina. INBA-CONICET, Instituto de Investigaciones en Biociencias Agricolas y Ambientales, Buenos Aires, Argentina. Facultad de Agronomia, Catedras de Quimica de Biomoleculas y Genetica, UBA, Av. San Martin 4453, CABA, Argentina. CONICET-INTA, EEA Delta del Parana, Parana de las Palmas y Cl Comas, Campana, Argentina. Instituto de Entomologia, FM Lillo, Miguel Lillo 251, San Miguel de Tucuman, Argentina. INQUINOA-CONICET, Instituto de Quimica Organica, Facultad de Bioquimica Quimica y Farmacia, Universidad Nacional de Tucuman, Ayacucho 491, San Miguel de Tucuman, Argentina"
Journal Title:		Bull Entomol Res
Year:		2019
Volume:		20190208
Issue:		5
Page Number:		633 - 642
DOI:		10.1017/S000748531900004X
ISSN/ISBN:		1475-2670 (Electronic) 0007-4853 (Linking)
Abstract:		"Volatile organic compounds (VOCs) released by plants are generally involved in host recognition and host selection for many phytophagous insects. However, for leafhoppers and planthoppers, host recognition is mainly thought to involve a phototactic response, but it is not clear if a host plant could be selected based on the volatile cues it emits. In this study we evaluated olfactory responses in dual choice tests of two Hemiptera species, Dalbulus maidis (De Long) (Cicadellidae) and Peregrinus maidis (Ashmead) (Delphacidae), vectors of maize-stunting diseases, to three maize (Zea mays L.) germplasms, a temperate and a tropical hybrid and a landrace. VOCs emitted by the germplasms were collected and identified using gas chromatography-mass spectrometry. The temperate hybrid released significantly more VOCs than the tropical hybrid and the landrace, and its volatile profile was dominated by (+/-)-linalool. D. maidis preferred odours emitted from the temperate hybrid, whereas P. maidis preferred odours from the tropical hybrid and the landrace over the temperate one. In order to test if linalool plays a role in the behavioural responses, we assayed this compound in combination with the tropical hybrid, to provide other contextual olfactory cues. D. maidis was attracted to the tropical hybrid plus a 0.0001% linalool solution, indicating that this compound could be part of a blend of attractants. Whereas addition of linalool resulted in a slight, though not significant, reduction in host VOC attractiveness for P. maidis. Both hopper species responded to olfactory cues in the absence of supplementary visual cues"
Keywords:		Acyclic Monoterpenes/pharmacology Animals Appetitive Behavior/physiology Choice Behavior Hemiptera/*physiology Insect Vectors/physiology *Smell Volatile Organic Compounds/*pharmacology Zea mays/*chemistry/classification Auchenorrhyncha leafhopper olfactom;
Notes:		"MedlineColl Araoz, M V Jacobi, V G Fernandez, P C Luft Albarracin, E Virla, E G Hill, J G Catalan, C A N eng England 2019/02/09 Bull Entomol Res. 2019 Oct; 109(5):633-642. doi: 10.1017/S000748531900004X. Epub 2019 Feb 8"