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Sci Rep

Title:		Olfactory response of Mahanarva spectabilis (Hemiptera: Cercopidae) to volatile organic compounds from forage grasses
Author(s):		Silva SEB; Auad AM; Moraes JC; Alvarenga R; Fonseca MG; Marques FA; Santos NCS; Nagata N;
Address:		"Universidade Federal de Lavras, Caixa postal 3037, Cep 37200000, Lavras, MG, Brazil. Embrapa Gado de Leite, Av. Eugenio do Nascimento, 610, CEP 36038-330, Juiz de Fora, MG, Brazil. alexander.auad@embrapa.br. Embrapa Gado de Leite, Av. Eugenio do Nascimento, 610, CEP 36038-330, Juiz de Fora, MG, Brazil. Universidade Federal do Parana, Rua XV de Novembro, 1299, CEP 80060-000, Curitiba, PR, Brazil"
Journal Title:		Sci Rep
Year:		2019
Volume:		20190716
Issue:		1
Page Number:		10284 -
DOI:		10.1038/s41598-019-46693-9
ISSN/ISBN:		2045-2322 (Electronic) 2045-2322 (Linking)
Abstract:		"Several herbivorous insects utilize plant chemical cues to identify hosts for feeding. The role of smell in host plant detection by Mahanarva spectabilis (Distant) remains largely unknown. In this study, assays were applied to assess M. spectabilis olfactory responses to forage grasses (Pennisetum purpureum cvs. Roxo Botucatu and Pioneiro; Panicum maximum cvs. Makueni and Tanzania; Hyparrhenia rufa cv. Jaragua; Melinis minutiflora; Cynodon dactylon cv. Tifton; Brachiaria brizantha cv. Marandu; and Brachiaria decumbens cv. Basilisk). Bioassays were performed using a Y-olfactometer to evaluate the behavior of adult M. spectabilis to forage damaged and undamaged by insects. M. spectabilis preferred volatiles of undamaged Basilisk and Pioneiro. Repellent behavior by M. spectabilis to cospecifics was recorded for plant volatiles from damaged Marandu. The mixture of volatiles from undamaged forage grasses differed from that of forage grasses damaged by insects. Forage grasses showed a greater diversity of compounds after damage, including menthone, eucalyptol and camphor, which are compounds likely to cause loss of attractiveness or repellence. Our results demonstrate that M. spectabilis employs plant chemical cues in its choice of hosts. This fact may contribute to strategies of integrated management against this pest"
Keywords:		"Animals Behavior, Animal/drug effects Hemiptera/drug effects/*physiology Herbivory Host-Parasite Interactions Insect Repellents/pharmacology Olfactory Perception Plant Extracts/pharmacology Poaceae/*chemistry/parasitology Smell/*drug effects Volatile Orga;"
Notes:		"MedlineSilva, Sandra E B Auad, Alexander M Moraes, Jair C Alvarenga, Roberta Fonseca, Marcy G Marques, Francisco A Santos, Nayana C S Nagata, Noemi eng Research Support, Non-U.S. Gov't England 2019/07/18 Sci Rep. 2019 Jul 16; 9(1):10284. doi: 10.1038/s41598-019-46693-9"