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J Chem Ecol

Title:		Chemical Ecology of the host searching behavior in an Egg Parasitoid: are Common Chemical Cues exploited to locate hosts in Taxonomically Distant Plant Species?
Author(s):		Manzano C; Fernandez PC; Hill JG; Luft Albarracin E; Virla EG; Coll Araoz MV;
Address:		"PROIMI - CONICET, Av. Belgrano y Pje. Caseros (T4001MVB), Tucuman, Argentina. Centro de Investigaciones en Hidratos de Carbono, CIHIDECAR-CONICET, Buenos Aires, Argentina. Facultad de Agronomia, Universidad de Buenos Aires, Av. San Martin 4453, Buenos Aires, Argentina. Facultad de Agronomia, Zootecnia y Veterinaria, Universidad Nacional de Tucuman, Av. Kirchner 1.900, Tucuman, Argentina. Instituto de Entomologia, Fundacion Miguel Lillo. Miguel Lillo 251, (4000), Tucuman, Argentina. PROIMI - CONICET, Av. Belgrano y Pje. Caseros (T4001MVB), Tucuman, Argentina. victoriacoll@hotmail.com. Facultad de Ciencias Naturales e IML, Universidad Nacional de Tucuman, Miguel Lillo 205, (4000), Tucuman, Argentina. victoriacoll@hotmail.com"
Journal Title:		J Chem Ecol
Year:		2022
Volume:		20220803
Issue:		7-Aug
Page Number:		650 - 659
DOI:		10.1007/s10886-022-01373-3
ISSN/ISBN:		1573-1561 (Electronic) 0098-0331 (Linking)
Abstract:		"Parasitoids are known to exploit volatile cues emitted by plants after herbivore attack to locate their hosts. Feeding and oviposition of a polyphagous herbivore can induce the emission of odor blends that differ among distant plant species, and parasitoids have evolved an incredible ability to discriminate them and locate their hosts relying on olfactive cues. We evaluated the host searching behavior of the egg parasitoid Cosmocomoidea annulicornis (Ogloblin) (Hymenoptera: Mymaridae) in response to odors emitted by two taxonomically distant host plants, citrus and Johnson grass, after infestation by the sharpshooter Tapajosa rubromarginata (Signoret) (Hemiptera: Cicadellidae), vector of Citrus Variegated Chlorosis. Olfactory response of female parasitoids toward plants with no herbivore damage and plants with feeding damage, oviposition damage, and parasitized eggs was tested in a Y-tube olfactometer. In addition, volatiles released by the two host plant species constitutively and under herbivore attack were characterized. Females of C. annulicornis were able to detect and significantly preferred plants with host eggs, irrespectively of plant species. However, wasps were unable to discriminate between plants with healthy eggs and those with eggs previously parasitized by conspecifics. Analysis of plant volatiles induced after sharpshooter attack showed only two common volatiles between the two plant species, indole and beta-caryophyllene. Our results suggest that this parasitoid wasp uses common chemical cues released by many different plants after herbivory at long range and, once on the plant, other more specific chemical cues could trigger the final decision to oviposit"
Keywords:		Animals Cues Female Host-Parasite Interactions *Host-Seeking Behavior Larva/physiology Oviposition Plants *Volatile Organic Compounds/analysis *Wasps/physiology Cicadellidae Citrus variegated chlorosis Cosmocomoidea annulicornis Host searching Mymaridae P;
Notes:		"MedlineManzano, C Fernandez, P C Hill, J G Luft Albarracin, E Virla, E G Coll Araoz, M V eng PICT 2015 1147/Fondo para la Investigacion Cientifica y Tecnologica/ 2022/08/04 J Chem Ecol. 2022 Aug; 48(7-8):650-659. doi: 10.1007/s10886-022-01373-3. Epub 2022 Aug 3"