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Exp Appl Acarol

Title:		Species- and density-dependent induction of volatile organic compounds by three mite species in cassava and their role in the attraction of a natural enemy
Author(s):		Pinto-Zevallos DM; Bezerra RHS; Souza SR; Ambrogi BG;
Address:		"Laboratorio de Ecologia Quimica, Departamento de Ecologia, Universidade Federal de Sergipe, Marechal Rondon, s/n - Jardim Rosa Elze, Sao Cristovao, SE, CEP 49100-000, Brazil. Instituto de Botanica, Centro de Pesquisa em Ecologia e Fisiologia, Av. Miguel Estefano Agua Funda, Sao Paulo, SP, CEP 09560-500, Brazil. Laboratorio de Ecologia Quimica, Departamento de Ecologia, Universidade Federal de Sergipe, Marechal Rondon, s/n - Jardim Rosa Elze, Sao Cristovao, SE, CEP 49100-000, Brazil. bianca.ambrogi@gmail.com"
Journal Title:		Exp Appl Acarol
Year:		2018
Volume:		20180224
Issue:		3
Page Number:		261 - 274
DOI:		10.1007/s10493-018-0231-5
ISSN/ISBN:		1572-9702 (Electronic) 0168-8162 (Linking)
Abstract:		"Upon damage by herbivores, plants induce an array of volatile organic compounds (VOCs) that mediate ecological interactions involving communication with organisms of the second and third trophic levels. VOC-mediated tritrophic interactions have largely been studied in various systems, including cassava (Manihot esculenta), but little is known about the chemical nature of herbivore-induced VOCs in this crop and the response they evoke in natural enemies. Several tetranychid and predatory mites are associated with cassava. Here, VOC emissions from uninfested plants and plants infested with 200 or 400 Mononychellus tanajoa, a specialist herbivore on cassava, and the generalists Tetranychus urticae and T. gloveri were measured. Dual-choice experiments were also conducted to assess the preference of inexperienced (reared on prey-infested bean plants) and experienced (adapted on prey-infested cassava plants) predatory mites, Neoseiulus idaeus (Phytoseiidae), between odors of uninfested plants versus odors of plants infested with M. tanajoa, T. urticae or T. gloveri. Two hundred individuals significantly increased the emissions of (Z)-3-hexen-1-ol, (E)-beta-ocimene, beta-caryophyllene, alloaromadendrene and (E)-geranyl acetone in T. urticae-infested plants, and (E)-beta-ocimene and methyl salicylate (MeSA) in T. gloveri-infested plants. Four hundred individuals significantly increased the emissions of (Z)-3-hexen-1-ol, MeSA, alpha-pinene and D-limonene in M. tanajoa-infested plants. In addition, T. urticae at this density induced (E)-beta-ocimene, D-limonene, (E)-geranyl acetone and six compounds that were not detected in other treatments. Tetranychus gloveri-infested plants induced the emissions of (E)-2-hexenal and D-limonene. Regardless of the infesting species, inexperienced N. idaeus did not discriminate between uninfested or infested plants. Upon experience, they discriminated between the odors of uninfested and T. urticae-damaged plants. Our findings reveal that mite infestations in cassava result in density-dependent and species-specific emission of VOCs, and that N. idaeus relies on associative learning to forage for its prey"
Keywords:		Animals *Cues Female *Food Chain Herbivory Manihot/*physiology Mites/*physiology Population Density *Predatory Behavior Species Specificity Tetranychidae/physiology Volatile Organic Compounds/*metabolism Indirect defenses Induced defense Mononychellus tan;
Notes:		"MedlinePinto-Zevallos, Delia M Bezerra, Ranna H S Souza, Silvia R Ambrogi, Bianca G eng 2012/11663-8/Fundacao de Amparo a Pesquisa do Estado de Sao Paulo/ Netherlands 2018/02/27 Exp Appl Acarol. 2018 Mar; 74(3):261-274. doi: 10.1007/s10493-018-0231-5. Epub 2018 Feb 24"