Identificação dos compostos defensivos encontrados nas glândulas metatorácica e abdominais dorsais dos percevejos Loxa deducta e Pellaea stictica (Heteroptera: Pentatomidae)

Fávaro, Carla F.; Zarbin, Paulo H. G.

doi:10.1590/s0100-40422012000800017

Cited by 6 publications

(1 citation statement)

References 11 publications

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“…A variação observada in vitro no tamanho do halo de inibição (superiores no método fumigação), pode ser explicada através da hidrofobicidade dos compostos que tem sua dispersão dificultada a partir do contato com o meio de cultura sólido. Considerando que ainda não se conhece completamente a interação entre os vários compostos presentes no feromônio de alarme dos pentatomídeos(FÁVARO & ZARBIN, 2012), o observado no presente estudo pode contribuir para essa discussão em andamento, buscando elucidar o que afeta o estabelecimento de infecções fúngicas a essa família de insetos. Além de sugerir que as observações acerca da espécie M. pingshaense estão intimamente relacionadas à virulência que esta apresenta para o controle de Euschistus heros.…”

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Susceptibilidade diferencial de >i<Euschistus heros>/i< (Hemiptera: Pentatomidae) a espécies de >i<Metarhizium>/i<: influência do feromônio de alarme no processo infectivo

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Susceptibilidade diferencial de Euschistus heros (Hemiptera: Pentatomidae) a espécies de Metarhizium: influência do feromônio de alarme no processo infectivo / Aline Nunes da Silva. -versão revisada de acordo com a Resolução CoPGr 6018 de 2011. --Piracicaba, 2023. p.Dissertação (Mestrado) --USP / Escola Superior de Agricultura "Luiz de Queiroz".1. Biodefensivo 2. Fungos entomopatogênicos 3. Microrganismos 4.

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Susceptibilidade diferencial de >i<Euschistus heros>/i< (Hemiptera: Pentatomidae) a espécies de >i<Metarhizium>/i<: influência do feromônio de alarme no processo infectivo

Silva

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Defensive Compounds and Male-Produced Sex Pheromone of the Stink Bug, Agroecus griseus

2012

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Agroecus griseus is a serious corn pest in Brazil. Contents of the dorsal abdominal glands (DAGs) in nymphs, and the metathoracic gland (MTG) in adults of this species were characterized and quantified. Compounds found were similar to those of other Pentatomidae species and included aliphatic hydrocarbons, aldehydes, oxo-alkenals, and esters. However, two compounds were found in the MTG that have not been described previously for this family. Mass spectrometry, infrared spectroscopy, and gas chromatographic analysis using coinjection with authentic standards confirmed the identities of the compounds as enantiopure (S)-2-methylbutyl acetate and 3-methyl-2-butenyl acetate. The five nymphal instars showed significantly different ratios of components, mainly between those of the first and later instars. No significant differences were detected in MTG contents between sexes. Gas chromatography (GC) analysis of aeration extracts of males and females showed the presence of a compound released exclusively by males. Gas chromatography - electroantennographic detection (GC-EAD) assays indicated that the male-specific compound is bioactive in females, suggesting the presence of an attractant pheromone. The mass spectrum and infrared data for this compound matched with methyl 2,6,10-trimethyltridecanoate, a sex pheromone component previously detected in the stink bugs, Euschistus heros and E. obscurus. The synthetic standard coeluted with the natural pheromone on two different GC stationary phases, confirming the proposed structure. Y-tube olfactometer assays showed that the synthetic standard was strongly attractive to females, and GC-EAD tests produced responses with antennae from females similar to those of the natural pheromone.

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Identification and Synthesis of the Male-produced Sex Pheromone of the Stink Bug, Pellaea stictica

2015

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Stink bugs are major pests of a wide variety of agricultural crops worldwide. The species Pellaea stictica is a Neotropical stink bug found in several South American countries. Chromatographic analyses of volatiles released by adults of this species showed that males produce a sex-specific compound, and bioassays with a Y-tube olfactometer showed that the compound was attractive only to females, confirming that it is a sex pheromone. Gas chromatography coupled to mass spectrometry and Fourier transform infrared analyses of the natural compound and several derivatives suggested that the structure was an alcohol with a saturated carbon chain and several methyl branches. After synthesis of two proposed structures, the pheromone of P. stictica was identified as a novel compound, 2,4,8,13-tetramethyltetradecan-1-ol. Laboratory bioassays showed that the synthesized mixture of stereoisomers of 2,4,8,13-tetramethyltetradecan-1-ol was as attractive to P. stictica females as the natural pheromone.

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Identificação dos compostos defensivos encontrados nas glândulas metatorácica e abdominais dorsais dos percevejos Loxa deducta e Pellaea stictica (Heteroptera: Pentatomidae)

Cited by 6 publications

References 11 publications

Susceptibilidade diferencial de >i<Euschistus heros>/i< (Hemiptera: Pentatomidae) a espécies de >i<Metarhizium>/i<: influência do feromônio de alarme no processo infectivo

Susceptibilidade diferencial de >i<Euschistus heros>/i< (Hemiptera: Pentatomidae) a espécies de >i<Metarhizium>/i<: influência do feromônio de alarme no processo infectivo

Defensive Compounds and Male-Produced Sex Pheromone of the Stink Bug, Agroecus griseus

Identification and Synthesis of the Male-produced Sex Pheromone of the Stink Bug, Pellaea stictica

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